2 Rechargeable Replacement Battery Pack and Dual Charger for GoPro HERO4 Black Edition. Silver Edition GoPro AHDBT-401, AHBBP-401 3.8V 1600 mAh This Kit Includes 2 PHOTO4LESS batteries and 1 Dual USB charge For your GoPro HERO4 Black Or Silver Battery features Digital Battery 3.8V, 1600mAh charger features a USB cord LED light indicated RED when charging and GREEN when complete Latest Lithium-lon Technology Maximum Power, Extended Run Time Five Years Warranty