Motorola Droid X and Droid X2 1800 mAh Extended Batteries BH6X, also for Atrix 4G, Free Charger with USB Port Batteries (BH6X) compatible with Motorola Droid X, Droid X2, and Atrix 4G 2 X 1800 mAh high quality Lithium Ion batteries that charges to its full capacity for over 500 cycles Grade A batteries with Dual IC protection to ensure safety; Battery Voltage: 3.7 Volts Battery Energy Content: 6.66 Watt Hours Universal Charger with USB Port that can charge your battery and cell phone at the same time Charger Input: 100-240V, 50/60HZ, 0.1A; Output: DC 4.2V, 300mA; USB Output: 5.2V 500mA