Will the phone be charged when the computer is turned off. Charging a smartphone from the USB port of a turned off computer
Many modern phones, especially those brought from abroad, are charged from the USB input of a computer or laptop. Charging with a charger is not possible for them for a number of reasons. This suits users who have a PC at home or at work. Therefore, the issue of the ability to charge the phone if the computer is turned off is very relevant. For example, the battery of the phone was at zero in the evening, and the computer was already turned off. So now, leave the PC on at night? Not necessarily. There is a way out of this situation.We will need to make changes to the BIOS settings, after which the USB port will recharge any device connected to it, while the computer itself will be turned off. The problem is that this feature is disabled by default. Our task is to enable this feature and use its capabilities.
We will need to make changes to the BIOS settings, after which the USB port will recharge any device connected to it, while the computer itself will be turned off. The problem is that this feature is disabled by default. Our task is to enable this feature and use its capabilities.
The user procedure will be as follows:
1. If the PC is turned on, it must be rebooted in order to enter the BIOS settings. To do this, during the reboot process, press one or more keys several times. Depending on the type motherboard the input will be different, since BIOS manufacturers thought little about the compatibility of their version with analogues from other manufacturers. For example, here are the keys and combinations for entering the BIOS for the main types of boards:
- Award BIOS - Ctrl+Alt+Esc combination or Del key;
- AMI BIOS - F2 or Del key;
- Phoenix BIOS - combination Ctrl+Alt+Ins(S, Esc).
2. In the BIOS menu, you have to find a section called "Advanced". All sections are located at the top of the screen in the form of a horizontal menu.
3. Next, you need to find the "AdvancedPowerManagement" subsection. This will be a vertical menu.
4. In the menu of this subsection, find the line "Legacy USB Support". You will see that the "Auto" parameter is in front of it. You need to change it by setting the value to "Enabled". This is done with the Enter key and cursors.
5. The BIOS settings are exited with saving the parameters. As a rule, the F10 key is pressed.
After the steps taken, you can safely turn off the computer and connect your device to the USB port, which will be charged.
Many users probably still remember those "ancient" times, when there were very few devices that were charged through the USB ports of computers or laptops. For most, it was only an iPod (well, or another similar player).
A little later, it was already possible to charge some smartphones via USB. But now “some” have turned into “all”, plus all sorts of 3G routers, fitness trackers, portable speakers and a lot of other gadgets have been added to them, each of which literally cannot live without regular USB connections.
But despite the arrival of the whole Windows 10 into the world, with USB old problem as it was and remained: as soon as the computer or laptop turns off or goes into sleep mode, its USB ports also stop “giving current” and no longer charge anything. True, Windows laptops were produced earlier and are now being produced, in which USB ports continue to function in sleep mode, but, as practice shows, not all users know about them.
Therefore, users for the most part, continuing to practice the “old-fashioned” method of charging via USB, simply leave their computers turned on every time they need to charge their smartphone or some other mobile device. The method, of course, is time-tested and effective, but, unfortunately, not the most convenient and very uneconomical in terms of power consumption (including the one that has to be drawn from the laptop battery in such cases).
In this regard, we remind you how to charge mobile electronics through the USB port of the switched off Windows computer, more precisely, how to set up your computer so that it also supplies energy to its USB ports in sleep mode.
And before you set anything up, without fail we carry out a mini-revision of the available USB ports to make sure that among them there are those that are configured to work in charger mode when the computer is turned off. If your computer (more precisely, the motherboard) has such a function, then the manufacturer of the machine should have painted these so-called charge-friendly USBs in a noticeable yellow color.
And to change the power settings of the USB port, go to " Device Manager " and there - in the section " USB controllers ". In the list that opens, find the line " Root USB Hub «.
Most likely, there will be several of them, but you only need those whose names are indicated in parentheses next to (xHCI) . These are USB 3.0 ports. Right-click on one of them and in the menu that appears, click " Properties ". Next, go to the tab " Power Management ", disable the option (uncheck)" Allow this device to turn off to save power » and click OK .
Now, even when the computer is turned off, you can charge various mobile devices via this USB. If one is not enough, then try connecting the second (if any). But it is quite possible that you will have to limit yourself to only one, since it is impossible to turn on the charger mode of all USBs at once in this way. Moreover, sometimes the USB charging option when the computer is turned off may not be activated so easily (I will not go into details why this happens). But the described method most often works.
Many users, for certain reasons, are forced to charge their smartphones from a computer or laptop.
Recently, more and more often you can hear that this method of charging is harmful to the battery of the device. Is it really? Let's figure it out.
Computer USB ports
There is an opinion that smartphones charged from a PC than those that were connected to the network using a conventional charger. There are also beliefs that such charging contributes to the rapid aging of the battery, due to which it loses capacity and subsequently discharges faster. This is partly true, but we need to study the details more carefully.
It is known that the USB ports located on the front panel of the system unit (often USB 2.0) are not able to provide the necessary charging current to fully “power” the battery. Sometimes this problem is irrelevant if you charge the gadget through the connectors on the back of the system unit, which uses the USB 3.0 interface. It all depends on the computer and the device being charged.
Charging speed and current
Another problem appears, which is the voltage and current in the USB ports. It changes frequently and creates a large thermal energy, which subsequently affects battery life. According to studies conducted in the USA, when the battery is regularly heated to 40 degrees Celsius for several months, its capacity drops to 65%.
It is important to know that the voltage in the interfaces is the same (5V), but the current strength is different:
- USB 2.0 - 500 mA.
- USB 3.0 - 800 mA.
We recommend choosing more modern interfaces - they are often blue and have more contacts. Obviously, charging the phone from a computer via a USB 3.0 port will be faster than via USB 2.0, but in most cases it is still much slower than via.
In fact, it is possible to charge a smartphone from a PC or laptop, but you should not abuse it - it is better to choose the original power supply. It turns out that when charging a phone from a PC, there are much more minuses than pluses. The latter includes only user convenience.
We all know that when the laptop is turned on (working), all USB ports are powered and we can charge the phone by connecting them to the laptop. But what if you want to charge your phone when the laptop is turned off? That is, if you need to charge your iPhone or android phone when your laptop is turned off or in sleep mode?
As a rule, we charge our phones by connecting them to our computers. This works well if you are working or playing while charging. You may have noticed that if you close the lid of your laptop or your computer goes to sleep, your phone will stop charging.
You can charge your phone or any other USB device using your laptop even when your laptop is turned off, as long as your laptop supports this feature. That is, not all laptops send power to the USB ports when they are disabled. The device disconnects the battery even if the phone remains connected to the laptop.
If your laptop supports this feature, one or more USB ports on the laptop will continue to receive power even after the laptop is turned off. There may be an icon next to the USB port to indicate that the USB port is receiving power even when the laptop is turned off. For example, the ThinkPad 450s has a battery icon next to one of the USB ports on the left to indicate that it is receiving power even when the laptop is not running.
If none of the USB ports are receiving power after the laptop is turned off, check the BIOS settings, usually there is a setting in the BIOS to enable or disable this feature. You can also check your laptop's user manual or contact the manufacturer to see if your device powers the USB ports when it's not working.
Here's how you can keep charging your phone, even with your laptop lid closed or your computer in sleep mode.
The method works works in Windows 7, 8, 10.
Step 1: Open Device Manager, in File Explorer, right-click " This computer", select « Properties", and click the " on the left side of the window.
Step 2: Find and expand the section USB controllers.
You will see several devices named "Root USB Hub".
Step 3: Required in every device "Root USB Hub" open Properties. In the properties window of the USB hub, click the " Power Management» and uncheck c "
Once you do this for all - USB Root Hub devices, you will be able to charge your phone, even with the laptop lid closed or in sleep mode.