Dead battery - maybe, maybe not...
I have been experiencing the same problems that GhostWheel posted.
My Droid phone will normally go for 2-3 days without a charge if I don't use it.
2 days ago my battery went "dead" in about 4-5 hours. For most of the morning the cellphone was at "idle", with: Wi-Fi off, bluetooth enabled, my bluetooth headset off, and no suspicious applications running. Unfortunately the battery was too dead to check the battery-usage statistics.
I rebooted the phone, plugged in the charger, checked the cell phone about 15 minutes later and it reported 100% charge!
I used the phone that day and recharged it once, so it was above 75% at the end of the day and I didn't place it on the charger. The next morning I found the phone turned off! When I rebooted, the battery was dead again!
This time it took hours to charge it. I did not charge it last night and today, with no usage yet, the battery is down to 60% just from "Idle", "Standby", and Bluetooth modes.
I'm taking my phone into Verizon to have it tested so that I have a record of the problem.
I hope this was helpful.