LG VX-8500 Chocolate

I've had this phone for 4 months now, and I cant wait to get rid of it. I love it but I know it will break, they all will (probably the touch pad).

Anyway, sometimes the battery shows a charge of, say, 3 bars. I listen to music for maybe an hour or two at work, then turn off the music player with 1 bar remaining. In a few minutes though there is another bar, and sometimes 2.

When I leave it in my cold car for a couple hours, and bring it into the house, this happens as well.

Does this happen to anyone else?

Thanks in advance.