So I ordered a 1500 mah battery by powerGen for my incredible. It was pretty cheap off of Amazon but it really works. I charged it when I first got it and unplugged it when the green light came on, well after an hour the battery bar had dropped one bar, well it would hold charge under medium usage for 12-15 after that. Well just the other night I let it charge from 4% until I woke up about 7 hours, that battery cycle lasted 17-18 hours under heavy use. The biggest test was playing music through headphones for 3 hours no stop, it went from 3/4 full to half life, I went to bed turned the phone off and was able to use the second half of the battery all day the next day. I was impressed.