EVERY SINGLE NIGHT.
I highly doubt i could make it through two days without charging... i should test that out.. my usage varies so if i'm not making any phone calls then it will probably last.
The battery usually ends the day around 45% for me. While this doesn't necessitate a charge its not enough to get through a second whole day so unfortunately I have to recharge daily. If only it lasted a little longer!
Posted from my CrackBerry at wapforums.crackberry.com
Every night, and half the day. Since I'm sitting at a computer at work, it's worth just keeping it plugged into the USB. I am a pretty heavy user, so its just worth keeping it plugged in.