CHG-USB-AHDBT501 : Dual-Pocket Smart Charger for GoPro 5, 6, 7, 8 5740-13F while physically remaining the same

while physically remaining the same size

BC-35: Desktop Rapid Chargers

The KNB-17 is a 7

RB-9 is 2 x AA cells side-by-side with solder tabs

Has adjustable sliding contacts to match your battery

CHG-USB-AHDBT501 : Dual-Pocket Smart Charger for GoPro 5, 6, 7, 8 5740-13F while physically remaining the sameCHG USB AHDBT501 : Dual Pocket Smart Charger for GoPro HD Hero 5, HD Hero 6, HD Hero 7, HD Hero 8. Accepts batteries such as AHDBT 501, AHDBT 601, AHDBT 701, AHDBT 801. Includes USB power cable for micro USB port. Charges up to 2 AHDBT 501 batteries at a time. Smart Charger, with automatic shut off when battery is full. Typical charge time = up to 2 hours. Charger unit also includes a USB Type C port, so your Type C cables can be used for charging.