Originally Posted by
milleniumdroid Brand approved charger has nothing to do with it. The phone should usually have protection should your aftermarket charger misbehave. The wall "charger" is more of a power supply, and the actual charger is inside the phone and controls the safe charging of the battery. As others have said, your battery just reached end of life.
Exactly. USB power by itself is
not suitable for charging batteries. To properly charge a battery, you must have some sort of charge controller that detects the battery's state of charge, and delivers the correct voltage and current. Some sort of DC-DC converter is used to create the right voltage for that particular battery.
The original USB power specification allowed up to 0.5A current at 5V, for 2.5W of power transfer. And that was for "high-power" devices! Quick charging bumps that up to as much as 36W, which is a lot to dump into a device the size of a phone that has no heatsink. IME, early versions of Quick Charge tried to charge phone batteries faster than was safe. My newer phones have power supplies limited to 18W.
If you have a phone that's prone to battery bloat, one thing you can do is avoid quick charging by using a USB power source that doesn't support Quick Charge. A USB power source that supplies no more than 2A at 5V (a lot of generic USB power ports do this) will charge a phone in a reasonable amount of time, but not so fast that the battery bloats. Also, don't let your phone go down to almost dead before you charge it, but don't leave it connected to USB power all the time. Every case of battery bloat I had was on phones that I kept plugged in 24x7.