The GoPro Dual Battery Charger + Battery for HERO9 Black includes a spare HERO9 Black 1720mAh battery and features a simultaneous dual charger for two 1720mAh GoPro batteries. The charger has a USB Type-C power port and comes with a USB Type-C to Type-A cable for use with USB wall plug adapters or other USB power sources.
Price: $89.95 from Camera House
Charge your MAX batteries using a USB port. The MAX Dual Battery Charger optimizes charging, so you’ll get a fully charged battery as quickly as possible. Includes a spare battery.
Conveniently charges two GoPro batteries simultaneously. Includes a spare 1220mAh lithium ion rechargeable battery.
Charge two GoPro devices or other USB devices simultaneously. Compatibility: All GoPro cameras and other USB devices