Looking to get a second (or third) backup battery for your Droid?
The Motorola DROID and DROID II 1300mah Standard Battery is what you need. It is identical to the battery that came with your Motorola Droid phone, including the hologram labeling that is printed on the bottom of the battery.
This is the original OEM Li-Ion Battery and has a rating of 3.7V,1390/1420 mAh. Consumers state they get about 24-30 hours of battery life which is comparable to the original.