Phone Heating up

My thunderbolt I've had since the day it came out and not until recently has it just heating up. Yesterday my battery drain completely from 6 p.m. to 11 p.m. and I hardly touched it. I picked it up about 9 and the whole phone was just hot the whole phone back and front. I've also seen the phone as it is on the charger just heat up any one else have this problem? Should I just take it to Verizon and is this covered by warranty?

Re: Phone Heating up
Contributor - Level 1

Mine stays pretty warm as well, I just ordered the 2750mAH battery, it doubles capacitance, but I'm hoping the battery stays cooler due to the increase in the area of heat dispersion. Seidio is going to make a killing on making batteries for the Thunderbolt.