Originally Posted by NickfromIL
I'm sure it is far longer if actually removed from the device, as when you "power off" the blackberry, it is really just kind of in a sleep mode. Notice how quickly it turns back on from "off" vs from battery removed.
He's right. I've seen Blackberry's turned off but go dead in a matter of a few days with the battery still in. If you actually remove the battery, it will last much longer (as in weeks).