Can the laptop be charged via USB

Charging circuits

laptop, charged

Since USB-C is a universal connection type that is capable of multiple operations at the same time, it allows for some unique charging conditions. There are two worth noting:

  • Pass-Through: Modern charging hubs offer what’s called pass-through charging. This applies to hubs that can connect multiple USB peripherals to a laptop and also charge its battery. Basically, it’s a combination of a power supply and a USB-C charging cable, so you don’t need to have two different ports for every task. HooToo’s popular 6-in-1 USB-C adapter is a good example of this technology. There are other innovative features like sending video to an external monitor and checking your laptop’s charging during a presentation.
  • Portable: You may still have a portable charger with an old USB connection, but your phone only supports USB-C (which is not compatible with older USB ports). You can connect the charger to a laptop that has both types of ports and use it for your phone in a roundabout way. Do not try to use a Type-C laptop charger to directly charge your phone as voltage requirements are too different and multi-device chargers are still new to the market.

For Apple Users

Apple users need to understand that they are not immune to the transition to the USB-C standard that we have seen in recent years. The company is currently using Lightning cables to charge its iOS devices. This is a patented design that does not fit with other manufacturers’ products. However, the company has already switched to USB-C charging for MacBook and iPad Pro. iPhone and regular iPad are currently unique as they still use Lightning.

At the beginning of 2020, the EU demanded the adoption of one charger standard that will be used in all devices. This will likely be USB-C, which will force Apple to ditch Lightning cables. Thus, they will completely disappear from the European market. Add to that rumors that Apple wants to ditch charging cables entirely in favor of a magnetic mount on the back of the iPhone, and we could see Lightning disappear completely in the next couple of years.

USB-C and Thunderbolt 3

Thunderbolt 3 is the more powerful USB-C option. Choose a laptop with at least one Thunderbolt 3 port to connect multiple 4K monitors at 60Hz and dramatically improve your gaming performance.

Thunderbolt 3 allows you to use multiple chargers: the technology can “link” up to six different devices together and easily charge while transferring data at faster speeds than USB-C alone (up to 100W).

Thunderbolt 3 uses the same connection as USB-C, however Thunderbolt 3 only works if the correct cables are used. Make sure of this in advance if you want to get the most out of technology and port bandwidth.

Type-C chargers fit any port?

USB-C is a universal charging standard. Thus, it doesn’t matter which adapter you use. it should provide power to the laptop that is equipped with a port and a power supply.

However, some laptops have USB-C ports that are unable to charge the device. This is most often found on computers that come with a proprietary charger, but some laptops can be charged in any way, only there is one feature: the charger developed by the manufacturer works faster. The Samsung Notebook 9 is a prime example of this, as is the 2019 HP Envy 13.

Laptops that rely entirely on USB-C don’t always fit any charger. During small tests, it was found that the Specter x2 from HP cannot be charged with any USB-C chargers other than the native one. The company itself stated that this was done on purpose, as a bad charger can damage the computer or cause it to malfunction. Other devices, such as the Apple MacBook Pro, do not have such hard restrictions. In any case, the new USB-C authentication system could help solve this problem in the near future.

We personally haven’t heard of any damage from using a USB-C charger instead of the standard one. However, we must admit that there is always a certain risk when connecting a laptop to an unknown power source. Broken cables can also create problems.

Microsoft confirms this by stating that users can charge Surface using the USB-C port, but the company strongly recommends using the Surface charger that comes with the laptop, as any other will run very slowly due to insufficient power. In short, cables and chargers are best bought only from trusted and trusted sellers and it is worth thinking twice before using a cable found somewhere on the floor in a conference room.

A guide to charging a laptop via USB-C

The USB-C output has completely changed many electronic devices. The connection can be used both for charging devices and for transferring multimedia, and the connector is double-sided. Today, even modern laptops no longer need a large PSU as you can charge it with Type C.

However, there are a few precautions to take when charging your computer via USB-C. We have collected all the factors that you need to know and take into account.

USB Chargers & Laptops

Everyone has probably used a USB connection at least once to charge their devices from a computer or an outlet. This works well as past generations of technology have had enough power to power small batteries successfully. However, previous USB specifications could transfer a limited amount of power, which is why laptop chargers usually had large and bulky cables.

USB-C has completely changed the situation. This type of connection provides enough power to run most laptops (especially the Type-C 3.0 version). That is why charging a laptop via a USB connection is a hot topic today. In addition, more and more Type-C charging laptops are entering the market.

How do you know if your laptop has a USB-C port that supports charging? The easiest way is to simply inspect the charger itself. A Type-C adapter can be easily identified by its unique characteristics as the connector is small and rounded, which is significantly different from the older USB version. It also works no matter how you plug the cable into the correct port, so there is no need to go through the whole ritual of turning the cord back and forth. If the charger supports this connection and plugs into the USB-C port, then we have good news.!

USB-C adapters are used on many devices, so they cannot be categorized as laptops only. Type-C is used in newer mobile phones, some car chargers, and portable chargers (more on this below). However, it is more common for manufacturers to install Type-C in laptops rather than other devices. At least for now.

The importance of settings

It is also worth paying attention to the established power plan, which can be found in the laptop’s settings. There is a Type-C input / output switching function. In fact, in this menu, the user selects whether the device will receive energy, or, on the contrary, deliver. If your laptop USB-C charger isn’t working when it should, check your settings to make sure it’s set to receive power.

The future of USB-C

A new USB version is just around the corner. The next line of technology will be the fastest, and we expect USB4 to come out in late 2020, starting with laptops with a new port. It goes without saying that USB4 adds another layer of complexity to the USB protocol problem. Here’s everything you need to know about the new technology:

  • USB4 will fit USB-C ports.
  • USB4 boosts charging speed and power to match Thunderbolt 3 (i.e. up to 100W).
  • To use the new USB4 features, you will need special cables formatted for the version.
  • USB4 will be backward compatible with USB 2.0.

We believe that the day will soon come when USB-C will become the main port, and others will recede into the background. USB4 and Thunderbolt are likely to be considered standards for the foreseeable future.

Which laptops can be charged via USB

Based on the above, it becomes clear that you can charge a laptop using USB only if it is equipped with a Type C connector. However, everything is not so simple here either. The main task of the USB interface is still to provide peripheral connectivity and high data transfer rates. Power delivery capability is governed by a separate Power Delivery specification. This is one of the alternative capabilities protocols embedded in the Type C connector.

To ensure compatibility, the new standard supports five different energy profiles. When connecting any external device, the minimum is used by default, with a current strength of up to 2 A and a nominal voltage of 5V. By exchanging data in accordance with the Power Delivery specifications, the source and the receiver will know if the higher voltage is supported. If the answer is yes, the profile is changed to the maximum possible for the connected device.

Is it possible to charge a laptop via a USB port

Initially, the USB standard was developed with the aim of simplifying the connection of external devices. The question of supplying power through it was far from the first place. The initial specifications provided for a current of 0.15 A and a power of 0.75 W at a nominal voltage of 5 V. This was enough to ensure the operation of a mouse or keyboard, but no more.

The specifications of the second generation increased the transmitted current to 0.5 A. This was already enough to power external hard drives. USB 3.0 provided a standard current of 0.9 A with the ability to amplify up to 1.5 A. This is enough current to charge a mobile phone.

Thus, before the introduction of the USB-C standard, it was not about supplying power to a computer, but about the ability to power external devices. In other words, you cannot charge a laptop through a regular port.

Which laptops cannot be charged via USB

So, the presence of a USB-C port on a laptop does not guarantee the possibility of charging it with a low Power Delivery profile. Let’s consider their parameters in more detail:

  • voltage 5V, current up to 2A, power up to 10 W;
  • voltage 5-12V, current up to 1.5-2A, power up to 18 W;
  • voltage 5-12V, current up to 1.5-3A, power up to 36 W;
  • voltage 12-20V, current up to 3A, power up to 60 W;
  • voltage 12-20V, current 4.75-5A, power up to 100 W.

To ensure the battery charge of the laptop, at least the third PD profile is required, which is able to provide the required power and amperage.

How to determine the purpose of a USB type C port

The easiest way to correctly identify the port assignments is to look at the laptop’s documentation. Any manufacturer always provides their list and functionality. External marking approved by the international consortium USB-IF, but not always applied correctly or in full.

If there are multiple Type C ports, the charging port should have the standard logo in a dark rectangular frame. The left side of the frame is convex and the right side is concave.

On the right side, a rectangle is additionally applied without one long line facing outward from the logo. The specification provides that for USB 3.1 Gen 2, the letters and numbers Super Speed ​​Plus (SS and 10) are additionally applied.

For simplicity, manufacturers sometimes apply a stylized image of an electrical plug or battery next to the charging port. Some models are equipped with a power connection indicator light, it can also be used to determine the main purpose of the connector.

How to charge a laptop via USB

Several years ago, this question could be answered unequivocally. This possibility is not provided by the protocol specifications. In 2015, the situation changed. The first laptop capable of charging via USB was released by Apple. Macbook with a 12-inch screen had only one universal port for connecting peripherals and recharging.

The new USB type C standard made it possible to realize this possibility. After the first wave of criticism, other electronics manufacturers appreciated the versatility of the solution and released models with similar characteristics.

Consequences when connecting charging via normal USB

Such an error will not cause harmful consequences if a “native” power supply and a certified cable supplied with the laptop were used. The protection provided by the Power Delivery protocol will work and the USB-C port will refuse to accept external power not intended for it.

Do you have any questions or do you have something to add to the article? Write about it in the comments. This will make the article more complete and useful.

What is USB 3.1 Type C?

All of you have probably heard of USB Type-C. First, let’s be clear: USB Type-C is the name of the connector and cable. And USB 3.1 or USB 2.0 are standards that describe all the key characteristics of data transfer and power supply of related nodes.

What is USB Type C for??

So what are these connectors and what are they for? Simply put, USB Type-C is the same USB, only more modern. Its main advantages include high data transfer rate, the ability to transmit a video signal, and a symmetrical design that allows you to insert the plug from either side.

Can I charge my phone by charging from a Type C laptop?

Both with USB Type-C. The block from the computer will charge the smartphone, but the computer will master the charging of the smartphone. But still, in this case, you can already live with one charger, a computer.

Is it possible to charge a laptop with a phone charger?

How to charge a laptop using your phone

Phones with a USB Type C port can be used to power the laptop. The laptop must also have a USB Type C port. The procedure is very straightforward and straightforward. Just plug the cord into the USB port of your phone and laptop.

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Is it possible to charge a laptop from 12 volts?

16 volts. These laptops can be powered directly from 12 volts (auto battery), just remember to remove the internal battery. If you want to charge the laptop, then through the charge resistor, or a light bulb.

Can HP laptop be charged via USB Type C?

No you can not. You can only charge if there is a thunderbolt icon next to the port. a lightning in a box.

How to charge

Ideas such as charging a laptop from USB and how to charge a laptop from a computer seemed very promising, and the developers were faced with the task of implementing them. This is how a new type of adapter appeared. USB Type-C. It has the ability to pass a charge up to 100 watts, which is quite enough for charging the batteries of low-power netbooks and for full-fledged computers. over, you can charge not only the device itself, but also another gadget from it. The dimensions of the new adapter are surprisingly small: 8.4×2.6 mm, which is much smaller than its predecessors, and the design is symmetrical.

Found a mistake in the text? Select it, press Ctrl Enter and we will fix everything.!

Portability is the main advantage of laptops over computers. People often use them away from the power supply, at the risk of not keeping track of the device’s charge. In order not to be suddenly cut off from the world of modern technology, it is advisable to provide backup options for recharging your laptop. Today it is possible to do this even via the USB port.

Is it possible to charge a laptop from a computer

Portability is the main advantage of laptops over computers. People often use them away from the power supply, at the risk of not keeping track of the device’s charge. In order not to be suddenly cut off from the world of modern technology, it is advisable to provide backup options for recharging your laptop. Today it is possible to do this even via the USB port.

Is it possible to charge a laptop via USB

The USB port is an interface for connecting peripheral devices to a computer. Developed in the early nineties, it was widely adopted and became the mainstream in digital technology. Its main advantage is the high compatibility of equipment of different generations. Now computers are installed either USB 2.0 or USB 3.0 (USB 3.1). Both of these connectors are not designed for charging the device from the mains: their bandwidth is only 4.5 watts. This charging power is not enough, at least 30 W is required.

How to charge a laptop via a USB port

The battery is the weak point of any laptop. The older it gets, the faster the battery runs out. Therefore, the question of recharging it becomes more and more acute, and the charger is not always at hand. Is it possible to charge a laptop via a USB port from another computer or from an external PowerBank battery? Let’s try to understand this issue.

If I had been asked such a question a few years ago, I would have answered with confidence that no, you cannot! Indeed, in the past, the USB port on a laptop was used exclusively for connecting peripheral devices. Yes, it was possible to recharge a phone or tablet from it, but it did not have the opposite effect. A special power supply was used to charge the battery. over, often each manufacturer had it with its own, individual connector, which was terribly inconvenient. Especially on the way.

But time passes and everything changes. The latest notebooks, netbooks and ultrabooks use the new USB 3.1 port for power connections. This is the so-called Type C connector. This is how it looks:

So, thanks to technological progress, you can finally use USB ports to charge your laptop.

How to charge a laptop battery without a charger

Not all manufacturers are in a hurry to include USB Type-C in new models of their gadgets, and, in general, sometimes a charger may not be at hand. This often happens when traveling, or when the electricity in the house is cut off. For such cases, it will be useful to purchase an external battery. This portable device will extend the operating time of your PC by several hours, depending on its power, and all kinds of adapters included in the kit will make it possible to recharge other equipment as well. One drawback. extra dimensions.

If you travel a lot in a car and want to use a laptop without regularly monitoring the charge, then you need to bring a portable inverter with you. There are no power outlets in the car, but this device will allow you to connect your laptop to the vehicle’s battery. Just remember to Honor that the car must be running to enable charging.

Solar panels will be a good solution for picnic lovers. Such a device allows the energy received from the sun’s rays to be converted into electricity. This is no longer an innovation, and it will not be a problem to get a suitable model. The obvious disadvantage of solar panels is stable recharging only in good clear weather. But nothing prevents you from fully charging the battery while it is sunny and using it in bad weather.

Is it possible to charge a laptop via USB

The USB port is an interface for connecting peripheral devices to a computer. Developed in the early nineties, it was widely adopted and became the mainstream in digital technology. Its main advantage is the high compatibility of equipment of different generations. Now computers are installed either USB 2.0 or USB 3.0 (USB 3.1). Both of these connectors are not designed for charging the device from the mains: their bandwidth is only 4.5 watts. This charging power is not enough, at least 30 W is required.

How to charge a laptop battery without a charger

Not all manufacturers are in a hurry to include USB Type-C in new models of their gadgets, and, in general, sometimes a charger may not be at hand. This often happens when traveling, or when the electricity in the house is cut off. For such cases, it will be useful to purchase an external battery. This portable device will extend the operating time of your PC by several hours, depending on its power, and all kinds of adapters included in the kit will make it possible to recharge other equipment as well. One drawback. extra dimensions.

If you travel a lot in a car and want to use a laptop without regularly monitoring the charge, then you need to bring a portable inverter with you. There are no power outlets in the car, but this device will allow you to connect your laptop to the vehicle’s battery. Just remember to Honor that the car must be running to enable charging.

Solar panels will be a good solution for picnic lovers. Such a device allows the energy received from the sun’s rays to be converted into electricity. This is no longer an innovation, and it will not be a problem to get a suitable model. The obvious disadvantage of solar panels is stable recharging only in good clear weather. But nothing prevents you from fully charging the battery while it is sunny and using it in bad weather.

Possible consequences of non-standard charging

Charging standards. As time goes on, one connector is replaced by another, and the standards for the electrical characteristics of chargers remain unchanged. But the rules are violated. now, to charge a large-capacity battery or accelerate charging, an increased voltage and current are supplied.

Important. Not all devices are designed for increased performance. But no matter how much the charger gives out, the device will take exactly as much energy as it needs. This process is controlled by the controller.

With “fast” charging standards, everything is similar. USB Power Delivery has a maximum voltage of 20V, which should simply burn out the connector of a gadget that is not prepared for this. However, these technologies require a mutual verification of compatibility. both on the charging side and on the device being charged. They exchange information, an instant check occurs, and charging begins. If the technologies do not match, then charging with minimum parameters is provided.

Is it possible to charge a laptop via USB?

One of the main advantages of a laptop is its portability. it is usually used where there are no outlets. Therefore, its Achilles’ heel is the battery. it is necessary to constantly monitor the charge level so as not to unexpectedly be left with a “dead” device in your hands. And the older the device, the shorter the battery life. Alternative charging options should also be considered. Today there are several of them, including through the USB port. Let’s dwell on this option in more detail.

A bit of history

At the end of the last century, it was decided to reduce the variety of ports (PS / 2, LPT, etc.), to replace them with the USB (Universal Serial Bus) standard. The first generation is designed exclusively for connecting external peripherals. The tasks to power them were not put in priority, the connector was supplied with 5V, 0.15A, with a power of 0.75 watts. This was enough to ensure the operation of the manipulator or keyboard.

In the second generation, at the same voltage, the current strength was increased to 0.5A, which made it possible to power external hard drives. The new standard of the third generation USB 3.1 Type-C could already power mobile devices. the current strength on it varied from 0.9-1.5A, the power was up to 15 W. What it brought us:

  • Data transfer rate 10 GBps.
  • The port is capable of charging devices that need up to 100W.
  • The new connector does not differ in size from micro-USB.
  • Complete symmetry, the absence of a key, breaking the position of which can damage the connector or the connected device.
  • Possibility of issuing up to 20V.
  • Identical connectors at both ends, i.e. supply voltages, depending on the need, can be transmitted in both directions.
  • Compatibility using an adapter with all “junior versions”.
  • The connector is guaranteed to withstand up to 10 thousand connections.

So, we see that before the introduction of the new standard, the ports were used exclusively to power external devices, and not to supply voltages to the computer itself.

Important. It turns out that you cannot charge the device through a regular USB port. It’s just not designed for this.

Determine the purpose of USB type C

The easiest and most effective way to find out the purpose of ports is to study those. documentation on the laptop. It always describes in detail the purpose of each port and its functionality.

The international consortium USB-IF has approved uniform requirements for external labeling, but manufacturers do not always apply it correctly and in full.

How to charge a laptop without USB charging

So is it possible to charge a laptop via USB? A little less than five years ago, any knowledgeable person would have answered unequivocally. the protocol specifications do not provide for such a possibility. But the situation has changed. The pioneer, as often happens, was the Apple digging. She released a laptop model with a universal port where you can connect peripherals and recharge the device. This is how a new USB type C standard appeared, highly appreciated by users and then taken up by manufacturers.

USB Power Delivery Standard

One of the specifications nested under Type C is the open standard USB Power Delivery (USB-PD). It describes the transfer of power between devices that are equipped with connectors. Transmission, not recharging, since at the next moment in time it can serve as a charger (Source) or who is charged (Sink / Receiver). They exchange messages with each other using a special protocol that runs in parallel with the usual USB. Using them, the donor and acceptor can change roles at any time, change the current, voltage, go into sleep mode. The transfer of energy up to 100 W is provided. energy, which is enough to recharge any mobile device, peripherals (monitor, printer, scanner). If necessary, it is provided with five energy profiles: up to 5V @ 2A, up to 12V@1.5A, up to 12V @ 3A, up to 12-20V @ 3A and up to 12-20V@4.75-5A.

For example, any external device is connected. By default, the first level is used. a nominal voltage of 5V and a current of 2A. There is an exchange of information, determination of the required voltage, current. Adjustment takes place and after that the required device is supplied to the device.

Which laptops can be charged via USB

Based on what was discussed earlier, it is clear that for autonomous recharging the device must be equipped with a special Type C connector. But not everything is so simple. As before, for USB ports, the main task is to connect peripherals, provide high-speed information exchange.

Charging connection via regular USB port

When using the “native” power supply and certified cable that come with the device, there will be no problems. The protection provided by the protocol rules will simply work, the port will be disabled and will simply not accept external power that is not intended for it.

Important. Owners of older models will not be able to charge the laptop through the USB port under any circumstances. All they have to do is carry a spare battery with them or stay close to the outlet.

The decision, as always, is only yours. Good luck!

Is it possible to charge a laptop from Power Bank

A laptop is a convenient portable device that we can take with us both to work and on a trip. But the problem lies directly in the charge of the battery, the volume of which is enough for 3-4 hours at best. When asked if a laptop can be charged from Power Bank, the unequivocal answer is yes! Technologies are improving every year, and now no one will be surprised at the creation of a portable charger (Power Bank), which can neutralize the lack of a nearby power source, which solves many problems for the laptop user.

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It should be noted that not every such device can become your faithful assistant when charging your laptop. To do this, the Power Bank must have the necessary characteristics or be specialized for a laptop charge. Let’s figure out how to charge a laptop via Power Bank.

How to choose a Power Bank to charge your laptop

To understand the question of whether it is possible to charge a laptop from Power Bank, you should make the right choice when buying it. When buying a mobile charger, pay attention to original devices with high-quality rechargeable batteries from popular manufacturers.

As a rule, low quality batteries are found on Chinese counterfeits. At the same time, manufacturers of such devices promise the consumer a capacity of 20,000 mAh, but in reality the promised volume available to the user is not observed. Accordingly, the output current on such a device will be low and will definitely not be enough to charge the laptop. By the way, connecting such a Power Bank to a PC will be very problematic.

The average laptop has a battery with a capacity of 10,000 milliampere-hours, so for the effective use of a portable charger either the same capacity or slightly less is necessary. This will charge your laptop, if not 100 percent, then at least 70-80 percent, which is a fairly good result.

Efficient laptop charging with Power Bank

Considering the efficiency of charging a laptop from a portable battery, we can confidently say that this method is very good. It makes it easy to use a laptop without access to the mains electricity.

Just imagine how pleasant it is to use a laptop at work or when moving to another city without a power supply. Your laptop battery plus the capacity of your portable battery is very convenient. This approach will provide you in the process of using a laptop PC about 5-8 hours of operating the device without being connected to a power source.

Required Power Bank Specifications for Laptop Charging

Often, owners of a portable charger wonder how to charge a laptop using the Power Bank. To do this, he must have the characteristics that will be described below.

To charge, the device must have an output voltage of 18 to 20 volts and a rated current of two amperes. Not all portable chargers have these parameters. As a rule, the exception is made by Chinese fakes of popular models and manufacturers of power banks.

In order to accurately select a device for charging a laptop, you should pay attention to the following things:

  • The presence on the case of ports for connecting a USB cable in 1A and 2A. The letter (A) following the number means the amperage that this port gives at the output. They can also be used simultaneously, and the figure, respectively, indicates the number of Amperes.
  • For comfortable operation of the charger and laptop, the power bank must have a storage battery capacity of at least 10,000 milliampere-hours (mAh).
  • The Power Bank must have a cable for charging a laptop with a certain size, so pay attention to the accessories of the adapters: they must be suitable for the device you want to charge. Otherwise, it will not be possible to connect even a charger that is appropriate in all respects to a laptop.

At the end of the description of the required characteristics of a Power Bank for charging a laptop, it is worth noting that there are specialized chargers with all the above characteristics and the required adapters. When choosing a power bank, pay attention to them.

Can I charge my laptop with Power Bank? Technique for charging a laptop using a power bank device

Power Bank is a universal portable charger with which you can recharge your smartphone or gadget from anywhere. Thanks to this invention, the problem of restoring the charge of a mobile device is easily solved. Can I charge my laptop with Power Bank? This question still arises for many people. The article will discuss in detail the solution to the problem of the possibility of charging a laptop using a portable Power Bank charger.

Connecting Power Bank to laptop via USB

Many powerbank users think that this device can be connected to a laptop via a USB cable. This is indeed possible, provided that you have the latest USB 3.1 port on your laptop. This type of connection also has another name. Type C.

If your laptop does not have the above connection type on board, but only USB 2.0 and 3.0, then you will not be able to charge the laptop through a “USB cable” under any circumstances. The reason for this is quite simple: ports 2.0 / 3.0 have a voltage transfer of only 4.5 volts, for a tablet and a smartphone this power can be suitable, and to charge a laptop at least 30, and best of all. 50 volts and above.

Charge from a universal portable battery

To charge a laptop from a Power Bank, you need to know how to properly “interact” with a portable device. This is an important point to consider before charging your laptop. So, the power bank must be charged up to 100 percent before using it on a laptop. If you purchased your device recently, you should fully charge and discharge it for optimal battery performance in the future.

If the device has not been charged to 100 percent, then there is no particular point in trying to charge the laptop, because it will be discharged much earlier than the laptop battery is full. An exception to this rule will be power banks with a battery capacity of 20,000 mAh and above.

Is it possible to charge a smartphone from a computer?

As mentioned above, there are many legends and horror stories about this. Some on the forums write that the “body” after such manipulations turned off, and then they could not start, they had to contact service centers.

But these are isolated cases that can be caused by completely different factors (power surges, accumulation of static charge on the case of the system unit, etc.).

If we compare the speed of “feeding” the battery, then ideally use the native charger supplied in the kit. This approach guarantees maximum compatibility and correspondence of voltage, current, which will allow charging faster and better.

But what if there is no such possibility? Then feel free to use the “cable computer” bundle and nothing bad will happen. It’s just better to connect to USB 3.0 (if any, it is marked in blue), which will speed up the procedure at times:

Just do not get carried away, since experiments prove that too frequent supply of “weak current” can over time reduce the nominal capacity of the battery, and the phone will start to discharge faster.

How to charge correctly?

Finally, I would like to give a few recommendations that can turn your ideas around. I dug deep into the topic and put together the following rules:

  • It is best to keep the charge in the range from 20 to 80%, avoiding zero or oversaturation;
  • If possible, the recharge procedure should be performed several times a day, “feed” the battery in small portions;
  • Protect the “energy source” from high (over 40) and low temperatures (-10). It is better to keep the gadget in a warm in frosty weather;
  • Do not put on overnight if you are not sure that your smart has an automatic power supply blocking system;
  • Calibrate periodically.

Is it possible to charge a smartphone from a computer

This topic worries many owners of mobile devices. can i charge my phone from a computer via USB? I watched a lot of videos, studied the issue on the forums, collected all the information and decided to share my findings with you.

The virus is ubiquitous!

After reading the messages of real people on the network, I learned about the existence of one threat that lies in wait for those who like to charge the phone from a computer.

We are talking about malicious scripts, Trojans that can penetrate from a PC to mobile devices during the cable connection. There are cases when a ransomware virus damaged the Windows file system and simultaneously destroyed data on the internal memory and microSD card in a smartphone.

Let’s start the dive.

I am sure that almost every modern person has a smartphone, or an older push-button device for voice communication and Internet access. A similar statement applies to a computer (laptop), which today is present in every home, office.

Often we have to connect gadgets to a PC using a cable in order to exchange data, dump a photo to a hard drive, or send the necessary files to a Smart device.

In addition to this function, the connection to the computer can be used to “recharge” the battery. For example, on my Xiaomi Redmi Note 4, immediately after the connection to the laptop, the notification “Charging from USB” appears. That is, in the phone itself, this action is supported, not blocked, and therefore is not prohibited / undesirable.

This is very convenient, because sometimes you are too lazy to reach for the outlet, to be distracted from work. It’s easier to take the lace, stick the ends into the necessary connectors and keep the device close at hand, waiting for the charging to complete.

As an answer to the question. Is it possible to charge the phone from a computer with a USB cable? I would like to say briefly: Yes, but not often! It is better to use a proprietary memory from the manufacturer.

Dangerous chargers

The HP Chromebook 11 is the first laptop to use a Micro USB connector for charging. Most laptops require more power and cannot be charged this way.

But this laptop was also taken off the market due to reports of overheating of the charger, which could cause a fire. HP Representative Advised Customers Who Purchased HP Chromebook 11 Not To Use Original Chargers Shipped With The Device.

You can continue to use your laptop by charging it using one of the micro-USB chargers approved by Underwriters Laboratories Inc. (US Standards and Certification Company), such as from a tablet or smartphone.

You will easily recognize chargers tested and approved by Underwriters Laboratories Inc they have the logo “UL Listed”.

This means that the charger has been tested for safety, will not cause a fire or shock you. But in some cases, even proven chargers can cause trouble, namely, when the device’s battery is faulty. So a non-original cheap charger and an equally cheap, non-certified battery can also cause a fire.

Can any charger be used for any gadget?

Each device: tablet, smartphone, e-book or laptop comes with its own chargers. At least that was until recently. Nowadays, most modern smartphones and tablets have a Micro USB connector and this is becoming the standard. Against this background, the question arises: is it possible to charge all your gadgets through one charger??

Despite the fact that over time more and more chargers are produced according to a single standard, several types of chargers are still widespread:

  • Laptops. Unfortunately, there is still no single standard for charging laptops and netbooks. There is no universal connector, which means that each device needs an individual charger.
  • 8-pin lightning connectors for Apple gadgets. Since 2012, Apple has standardized the 8-pin connector, and now all devices released after this year: iPhone, iPad, iPod Touch, iPad Nano, can be connected using a charger certified and developed by Apple.

8-pin Lightning connector

Older Apple devices have a 30-pin connector, and for those who have them, Apple releases lightning → 30-pin adapters.

  • Micro USB chargers. All new smartphones, including those based on Android and Windows Phone, come with a standard micro USB connector, so there is no need to select individual chargers for them, as for old mobile phones. To comply with this standard, Apple offers Lightning connectors → Micro USB adapters.

Can any Micro USB device be charged from any Micro USB charger?

In theory, each Micro USB charger can be plugged into a device with such a connector, which means that it can be used for any device at all, be it a smartphone, tablet or even a laptop. Very convenient. if you buy a new smartphone or tablet, you can charge it with an old charger. The only difference is in voltage and amperage, but more on that later.

Even through the Micro USB → USB adapter, you can easily charge the device from a laptop without any problems.

Voltage and current

All USB connectors are rated for 5V. This means that you can safely connect the charger to the device via micro USB.

The strength of the current is another matter. To charge the device faster, chargers increase the amperage, which is measured in amperes (A). The chargers that come with Android tablets are rated for higher amperage than those for Android smartphones. For example, a charger for a tablet is rated at 2A, while a charger for a smartphone is only rated for 1A.

If you connect a charger from a smartphone to a tablet, the tablet will charge very slowly because there is not enough current to charge it normally. If you try to charge your smartphone through a tablet charger, nothing terrible will happen, and your smartphone will not explode and light up.

Most likely, the smartphone will not take the maximum possible number of amperes that the charger provides, so everything will be fine. Maybe the smartphone will only charge a little faster.

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Can any charger be used for any gadget?

Each device: tablet, smartphone, e-book or laptop comes with its own chargers. At least that was until recently. Nowadays, most modern smartphones and tablets have a Micro USB connector and this is becoming the standard. Against this background, the question arises: is it possible to charge all your gadgets through one charger??

Despite the fact that over time more and more chargers are produced according to a single standard, several types of chargers are still widespread:

Laptops. Unfortunately, there is still no single standard for charging laptops and netbooks. There is no universal connector, which means that each device needs an individual charger.

8-pin lightning connectors for Apple gadgets. Since 2012, Apple has standardized the 8-pin connector, and now all devices released after this year: iPhone, iPad, iPod Touch, iPad Nano, can be connected using a charger certified and developed by Apple.

8-pin Lightning connector

Older Apple devices have a 30-pin connector, and for those who have them, Apple releases lightning → 30-pin adapters.

Micro USB chargers. All new smartphones, including those based on Android and Windows Phone, come with a standard micro USB connector, so there is no need to select individual chargers for them, as for old mobile phones. To comply with this standard, Apple offers Lightning connectors → Micro USB adapters.

Can any Micro USB device be charged from any Micro USB charger?

In theory, each Micro USB charger can be plugged into a device with such a connector, which means that it can be used for any device at all, be it a smartphone, tablet or even a laptop. Very convenient. if you buy a new smartphone or tablet, you can charge it with an old charger. The only difference is in voltage and amperage, but more on that later.

Even through the Micro USB → USB adapter, you can easily charge the device from a laptop without any problems.

The HP Chromebook 11 is the first laptop to use a Micro USB connector for charging. Most laptops require more power and cannot be charged this way.

But this laptop was also taken off the market due to reports of overheating of the charger, which could cause a fire. HP Representative Advised Customers Who Purchased HP Chromebook 11 Not To Use Original Chargers Shipped With The Device.

You can continue to use your laptop by charging it using one of the micro-USB chargers approved by Underwriters Laboratories Inc. (US Standards and Certification Company), such as from a tablet or smartphone.

You will easily recognize chargers tested and approved by Underwriters Laboratories Inc they have the logo “UL Listed”.

This means that the charger has been tested for safety, will not cause a fire or shock you. But in some cases, even proven chargers can cause trouble, namely, when the device’s battery is faulty. So a non-original cheap charger and an equally cheap, non-certified battery can also cause a fire.

All USB connectors are rated for 5V. This means that you can safely connect the charger to the device via micro USB.

The strength of the current is another matter. To charge the device faster, chargers increase the amperage, which is measured in amperes (A). The chargers that come with Android tablets are rated for higher amperage than those for Android smartphones. For example, a charger for a tablet is rated at 2A, while a charger for a smartphone is only rated for 1A.

If you connect a charger from a smartphone to a tablet, the tablet will charge very slowly because there is not enough current to charge it normally. If you try to charge your smartphone through a tablet charger, nothing terrible will happen, and your smartphone will not explode and ignite.

Most likely, the smartphone will not take the maximum possible number of amperes that the charger provides, so everything will be fine. Maybe the smartphone will only charge a little faster.

Is it possible to charge the computer via the USB port?

Can I charge computers by calling 5 volts into USB connectors? Is it possible? I noticed that when my EeePC 900 is turned off but connected to a charger, power comes out of the USB port. Could this be a sustainable way to charge your PC or a design flaw??

I have an EEE computer with an optional charger that I can use in my car. It plugs into a cigarette lighter that seems to be standard in every car. When on the go, it allows me to charge my laptop this way. Very practical.

But USB charging is only possible from one side of the USB connection, not both sides. Basically, the USB ports on a laptop are used to send a signal, so they can be used to turn on the power. Many rechargeable USB devices are designed to receive a signal, so they wait until they receive power from the port. Technically, it’s just a one-way street.

However, they can make a laptop that can be recharged via the USB port if they add a receiving end to it. Basically, this means that you cannot connect your device to your laptop, but you will be connecting your laptop as if it were just another device to another PC. Will it be practical? Perhaps if you want to do this to set up an ad hoc network or whatever, but no one has seen any true value in such a setting. Basically, you will be downgrading your laptop to a portable hard drive.

However, as mentioned by others, the average laptop will require slightly more power to fully charge than other devices. Especially the large screen and disks are big energy consumers, although the processor itself also imposes some load on the system. The power that the device receives through the USB port is only a fraction of the power that the device will receive through a direct connection to the network.

The closest thing to a computer that can be charged via a USB port is a Windows Mobile smartphone. Or perhaps a UMPC system. but I don’t know of any good UMPCs that recharge this way. I assume that you also have a few wishes regarding the operating system, disk space and memory.

Applying power to the USB port while the computer is off sounds like a way to damage something.

To charge your computer, you need a direct connection to the battery.

The USB port won’t give you that. The 5V that comes out of USB is (more or less) carefully regulated by the electronics. Electronics does not work in reverse.

I don’t know which computer can be charged using the USB port. The capacity of the USB connection is up to 500mA (milliamperes) at 5V or 2.5W per power port. That’s not enough to actually run a typical laptop these days. It is worth noting that USB1.1 ports only support 100mA.

Basically, you could get a separate external battery charger for USB powered laptops, but that would be very slow and I’ve never heard of it.

While this is probably not what you are looking for, the HP Chromebook 11, which was released a few months later (and recalled recently), charged using a mirco USB port. Looks like he’ll happily run away with a 3 amp charger. There is no real physical limitation for USB, just as there is no real physical limitation of using the 3.5mm AUX jack to charge a small device (such as an iPod Shuffle), but it is generally a very bad idea to transfer charge to Direction. which is not expected.

What happens if you charge a smartphone from a laptop

Modern phones have improved a lot, but users have to pay for new features with short battery life. If you constantly use your smartphone for entertainment, surfing the Internet or making phone calls, the battery usually discharges in half a day (5-7 hours).

A message appears on the screen asking you to connect the device to the electrical network, and here a problem arises. often there are no free outlets nearby. You can always recharge your phone from a computer or laptop. just use the USB port. We will look at the advantages and disadvantages of this method.

Difference between charging from USB 2.0 and 3.0 connectors

Most modern computers have modern USB 3.0 ports. This connector allows you to quickly charge your phones thanks to the increased current strength of 900 mA. The outdated analogue (USB 2.0) had an indicator of 500 mA, which is why smartphones were charged from computers very slowly. If it is important to quickly get a few percent of the charge, connect your phone to a modern USB port (3.0). As a rule, such a USB port inside is blue.

What if, the USB port stops working after charging

Sometimes the phone puts a heavy load on the USB port, and it stops working, as if it freezes. In such cases, the message “The USB device is not working properly and has exceeded the power limits for its hub port” may also appear. Then it is better to disconnect the phone from the computer and it is from it that it is better not to charge. In the window with a message about the problem, click the “Reset” button, if any.

But even after stopping charging, the USB port may still not work. In this case, you can:

  • Go to Device Manager
  • find a broken USB Root Hub, which will be marked with an exclamation mark
  • go to “Properties. Food “:
  • Press the “Reset” button.

But if this does not help, then unplug the computer completely from the power supply. If this is a laptop, then it is also better to remove the battery for 10 seconds and put it back. Now plug in and check.

Arguments against charging from a computer:

  • Virus Infection Threat. If you connect your smartphone to someone else’s computer, you can accidentally get a dangerous file. a virus. To insure against the problem, before connecting, open the phone settings section and select the “Charge only” mode. This function blocks the transmission of information.
  • Slow charging. The USB ports of the computer cannot provide the required current to charge the mobile phone, so the battery charges slowly. Sometimes you need to wait a few hours for the smartphone to reach at least 50 percent of the charge.
  • Battery worn out. Some users have noticed that with frequent recharging from a computer, the smartphone’s battery starts to drain faster. That is why phone manufacturers recommend using original chargers to fill the battery with energy.

Arguments for charging from a computer:

  • The ability to stay connected. Sometimes you need a few percent of the charge to make an important call or send a message. It is enough to connect the smartphone to the nearest computer and replenish the battery of the device.
  • Convenience. If there is a computer nearby with several free USB ports, you do not need to look for a free outlet or install an electrical splitter.

In total, in 99% of cases, you can recharge your smartphone from a PC or laptop without any fear, especially if you need to make an important call. I recommend using this feature when needed, rather than all the time. Otherwise, the risks, albeit unlikely, are possible. infection of the device with viruses and the rapid depletion of battery resources.

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