Powerextra 4 Pack High Capacity 1500mAh Replacement Batteries for GoPro HERO4 and GoPro AHDBT-401, AHBBP-401 Includes 4 batteries power your GoPro HERO4 camera Rated at 3.8V and 1500mAh for a longer running time. Powerextra products are CE certified, tested by manufacturer to match OEM products. Charging at any time will have no effect on the battery Products come with our Powerextra is 30 days money back 12 months limited guarantee against manufacturer defects from date of purchase,and 24 Hours friendly customer service!