GoPro MAX Dual Battery Charger + Battery | Sweetwater
Gopro Max Dual Battery Charger + Battery Offcial Original Go Pro Accessories Fit For Max Camera Batteries Charger - Sports & Action Video Cameras Accessories - AliExpress
Benson & Company - The GoPro MAX Dual Battery Charger that comes with an extra battery automatically prioritizes which battery gets charged first, so you'll get a fully charged battery as quickly