I was home sick the other day. I played "Jewels Maze" constantly for about 3 hours and my battery ran out. So i plugged the phone into the wall adapter that came with the phone and I still ran out of power. (The screen simply went black.) The next day I tried an experiment with a newly charged battery and the phone plugged into the charger. I played Jewels Maze for about 4 and a half hours before I ran out of juice. I guess this all makes sense since it normally takes about 5 hours to fully charge my phone. But this is the first product I've ever owned that wouldn't run forever on the wall adapter. Thoughts?