M2cpower&reg; 4 Pack GoPro Hero 3 1050mAh Replacement Batteries for GoPro Hero 3 Package Includes 4 batteries power your GoPro Hero 3 camera Rated at 3.7V and 1050mAh Premium Grade A cell for longer battery life with no memory effect M2cpower Products are CE certified, tested by manufacturer to match OEM products. 30 days money back 12 months seller's guarantee against manufacturer defects from date of purchase