Masione 3.7V 1600mAh 5.9WH Power Battery (2 Pack) and Dual Charger (1 Pack) for GoPro HERO4 and GoPro AHDBT-401 AHBBP-401 2 Pack 3.7 Volts 1600mAh rechargeable battery and 1 Dual charger 100% Compatible with GoPro AHDBT-401, AHBBP-401 Batteries are made with the highest quality materials No memory effect so that you can charge battery at anytime 24 Hours friendly customer service, 30 Days money-back guarantee and 1 Year Warranty!