LS Accessories153; 1450 mAh Batteries for HTC Thunderbolt (ADR6400L) with Free Compact Charger with USB Port Compatible with HTC Thunderbolt (ADR6400L) 2 X 1450 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: 5.37 Watt Hours Easy to use Compact Charger specifically designed to be perfectly compatible with battery. Charger Input: 100-240V, 50/60 HZ, 150 mA; Output: DC 4.2V, 350mA; USB Output: 5.2V, 800mA