Although the manufacturers of smart phones They are continually working to improve the autonomy of our devices, battery life continues to be the weak point of cell phones. Fortunately, we have a feature known as reverse charging which is very useful when we don’t have a charger or outlet on hand.
More precisely, the so-called reverse charging allows you to transfer charging from one device to another in two different ways: via the device’s charging port or wirelessly. With this feature you can turn your old Android into a power bank with which to recharge your mobile anytime and anywhere.
Share the battery without cables
The most convenient option is undoubtedly wireless charging. Yes, this option It is reserved for modern high-end mobile phonesso you probably won’t find it if the device you want to convert to power bank it’s old. If you have a compatible mobile phone, you can activate it from the battery menu.
It is important to draw attention to Battery sharing This is a function that is disabled by default, it must therefore be activated beforehand to take advantage of its potential. To do this, simply enter Settings > Battery and look for the option Battery sharing. Then you will have to activate it using the corresponding button.
Once you enable this feature, you can charge other devices by placing them on the back of your mobile, as if it were a wireless charger. Of course, reverse wireless charging has some drawbacks: it’s inefficient and it’s easy to lose contact between devices. Of course, the battery of the mobile phone that acts as a charger will drain much more quickly than normal.
One of the advantages of Battery sharing is that we can configure the function to set limits regarding battery usage. Concretely, it is possible to adjust when do we want to stop sharing battery of the mobile phone, thus preventing the device we use as power bank lose too much battery: for example, when the phone reaches 10% battery.
Reverse charging via cable
This option is much more common than the previous one, although to take advantage of it you will have to carry a cable to connect the two devices. Once activated and the cell phones connected by cable, the device with the most battery will be the one that powers the other (although it is possible to modify this behavior).
Although reverse charging via cables is compatible with many devices, it cannot be used on all mobile phones. First of all You will need to check that the mobile phone is USB OTG compatiblesomething you can do using apps like USB OTG Checker.
Compatible with USB OTG checker
This utility allows us to quickly check if our mobile phone is compatible with USB OTG
If supported, you can enable reverse charging in the section USB Preferences what you will find in Settings. Specifically, in this menu you will see the option Reverse charge. Simply select this option to be able to charge other devices via USB.
As you may have seen, enabling this feature only takes a moment and can be very useful on many occasions. If you have an old cell phone at home, we recommend giving it a second life. power bank.
Cover image | Iván Linares (Xataka Android)
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