GoPro Battery 2 Pack, Batteries for GoPro Hero 3, High Capacity Rechargeable Replacement Batteries W/ Dual Rapid Charge Charger for GoPro Hero 3 Gopro Hero 3+ (by Sharkk) 2 LITHIUM-ION BATTERIES  Includes 2 rechargeable 3.7V 1050mAh lithium-ion batteries, dual dock charger and USB charging cable. DUAL DOCK CHARGER  The dual dock charger allows you to charge 2 GoPro batteries simultaneously so you can always keep the camera rolling. OVERCHARGE PROTECTION TECHNOLOGY  LED indicator lights inform you when the batteries are fully charged and ready for use. The overcharge protection technology makes sure you do not overcharge your batteries or damage them from excessive heat that can be caused during charging. COMPATIBILITY  The batteries and charger are only compatible with GoPro HERO2, HERO3, and HERO3+ cameras. The included standard USB charging cable works with any 110V wall outlet, USB car port or computer.