Will using a 2A charger damage my phone?

The phone decide the amperes of its charging current ... the supply just has to be able to deliver it.

Use the 2A output, your phone won't take more than 1A

Harry

 

Not sure where Harry gets his information on the phone tech, but I always based charging on what I learned, and from what I got from asking my mom (an electrical engineer). The phone itself won't be damaged, but the battery can.

Typically, commercially available batteries are rated at 1Coulomb, which means that a 1000mah battery draining at will provide a current of 1000mah for one hour. This known as a C-rate. So for a 1000mah battery, a C-rate of 0.7 is 700mah (as an example). The safe charge rate for any battery is always at 1C, and never below 0.3C. You can only use a charger with a rating of above 1C if your battery specifically says it is compatible with ultra-fast chargers (beyond 1C rating).

 

There's a chip built-into the battery that regulates charging. Shouldn't cause a problem.

 

Well, this is important knowledge about batteries if one would want to develope a charger.

But a phone's battery is protected with its charging controller.
The charging controller won't let flow a current that would be dangerous for the battery.

Harry

 

Well, I can't say for older phones, but I know for a fact Sony's batteries are safe for Ultra Fast charging at 10Cs.