Progo 4 Battery and Dual Charger for GoPro HERO4 and GoPro AHDBT-401, AHBBP-401 Get extra power for your GoPro HERO4 camera Charge two HERO4 batteries at once; Batteries each rated at 1160mAh Premium li-ion cells for longer battery life with no memory effect Compatible with the HERO4 Black and HERO4 Silver models Includes dual charger and four batteries with Progo 3 years manufacturer warranty