When I first got the phone and after a few weeks I could get 2 days then I was able to get 3 days out of my phone before having to charge it. I play a few games, maybe surf the web off and on a few times during the day and some calls and I could still get 3 days out of a charge. Then I thought why not and add my pop3 email account to the phone, I had no problems with it checking my GMail accounts all day long. But when I added my other cable provider email acct. the drain was fast, I played with the settings on how long it took to check the email acct. from 2 hours up to once a day. it still pulled a lot of battery and was down to chargeing it once a day. a funny thing was when I started using this email program on the phone it and I would run my app killer (every time befor I laid the phone down), the "advanced app killer" the phone would go into a somewhat reboot state. the HTC screen would show up and I would have to wait while the load with circle logo to run for the icons and widgets to show back up. I deleted that email account and everything is back to normal. back up to 3 days out of it again. Just thought I would pass this along to those that might still have issues with battery drain.