InSassy (TM) Dual Charging Dock + 2 Rechargeable Battery for xBox 360 Black Charge two batteries at once; LED Indicator Light Two Rechargeable Batteries included for your xBox 360 wireless Controller Works with Quick Charge & Play Kits Input: AC 100-240V 50-60Hz / Output: DC 2.8V / Power: 6W Battery Capacity: 4800 mAh