Mr.Batt 1160mAh Replacement Battery for GoPro HERO4 Black / Silver (Pack of 2) Battery type: Rechargeable Li-ion, voltage: 3.8V, capacity: 1160mAh, power: 4.4Wh Repalce GoPro AHDBT-401 battery, and compatible with GoPro HERO4 Black / Silver Same power as the original ones, 100% true capacity CE certified and tested by manufacturer to match OEM products 30 days money back guaranty and 1 year limited warranty