Back when I had a 4S I dropped it in some liquid and stupidly plugged it in. The battery corroded and got super hot anytime it was on. It would barely keep a charge for an hour. I now have had a 5 since launch and had no issues with it. Yesterday, randomly, it started getting very hot while in operation. I haven't particularly noticed any issues with holding a charge...yet. There has been no water damage to it whatsoever. When I look at the lightning connector inside the phone it looks a little brown and cracked. So, the question is, if I take this in to the Apple Store and there are no water censors tripped, will they replace it under warranty? Or, is battery corrosion considered water damage even without anything tripped?