Ultra High Capacity (1600 mAh) 2 Pack Battery & Dual Charger Set for GoPro HERO 4 Action Camcorders: Replaces AHDBT401 AHDBT-401, AHBBP-401, AHBBP401 High-tech Japanese cells,rechargeable Li-polymer batteries. They are fully compatible with the GOPRO HERO 4 Silver & GOPRO HERO 4 Black Charge two HERO4 batteries at once; Batteries each rated at 1600 mAh Compatible with the HERO4 Black and HERO4 Silver models; BestBatt charger works with Original GoPro batteries & GoPro charger and camera can charge BestBatt batteries Includes dual charger and two high capacity (1600 mAh) batteries