will gaming destroy my phone battery? I think games probably destroyed my Note 2 battery. I often play games for hours straight while charging. Last Sunday it was dead with horrible heat. Then I borrowed friend's mpj backup battery, swapped it, and everything worked perfectly again.
Now I have ordered a new battery online. I am not sure if playing games while charging could destroy the battery, if so, i swear wont do it again.
Charging and playing heavy games damages the battery very quickly. It is caused due to the overheating while charging, short Recharge n discharge cycles while charging n playing games and heat due to the GPU. Heat is the sole enemy of Battery. This is the same scenario in most of the mobile devices.

I recommend you to first fully charge the device n play until the charge drains out. I know it's a bit harsh.