Due to some quesitons of how the battery works ill edit my post....
I am not sure if this has been brought up somewhere so sorry if this is a repost but............
Charge your Droid for 24 Hours Straight!!! Period!
My battery used to last about 11-12 hours before it died. I charged for 24 hours and I am 60% with 17 hours since I unplugged.
Regardless of how or why this works, the directions in the Droid booklet state to charge the phones for 24 hours before use.
Put this to the test. Worked for me, hopefully it will work for you!
Hope this helps,