Just thought I would pass this along. It is the OEM BH5X Battery for $6.00, I know it is the stock battery but for $6 you can't beat it.
Amazon.com: NEW MOTOROLA OEM BH5X BATTERY FOR DROIDX DROID X MB810: Cell Phones & Accessories
Amazon.com: NEW MOTOROLA OEM BH5X BATTERY FOR DROIDX DROID X MB810: Cell Phones & Accessories