Motorola SNN5879 Extended Battery for Motorola BF6X/Droid 3 - Original OEM - Non-Retail Packaging - Black This 1880mAh battery will surely last longer than your standard battery. This extended battery requires an extended battery door. Are you looking to extend the use of your Motorola Droid 3. The Motorola BF6X 1880mAh Extended Battery, manufactured by Motorola. Part Numbers: SNN5879/SNN5879A.