I am getting 9-10 hours off a nightly charge on my Evo. This isn't lasting me the whole day and I usually run out of juice on the drive home from work. I've tried all the battery tricks to get longer time but no luck. I think the reason for the battery drain is because at work, I only receive 1-2 bars on the 3G network. When I step outside, I go to 4-5 bars. I am blaming the battery drain more on my location rather than the phone, which is OK. Anyways, I have the luxury of sitting in front of a laptop all day. This means I can constantly charge my Evo all day through the USB port. Would this have any bad effect on the battery? This means taking the phone on and off the charge throughout the day. If I leave my desk for 10-15 minutes, I'm unplugging the Evo and taking it with me. This could happen 5-10 times a day. Or is it better just to do a charge 1-2 hours before I leave work to make sure it will last the remainder of the evening?