Gopro Accessory Max Dual Battery Charger + BatteryCharge your MAX batteries using a USB port. The MAX Dual Battery Charger automatically prioritizes which battery gets charged first, so youll get a fully charged battery as quickly as possible. Includes a spare battery. For up to 48% faster charging, 1 use it with the GoPro Supercharger (International Dual Port Charger). 2 Conveniently charges 2 MAX batteries using a USB port Optimizes charging so youll get a fully charged battery as quickly as