Charge your BP-975 battery with the CMDual base charger using this BP-975 Battery Adapter Plate from BLUESHAPE. The adapter plate accepts one BP-975 battery, and the plate is installed on one of the slots on the CMDual base charger. You can either purchase two adapter plates to fill both slots on the base charger or mix and match with another adapter plate.
Compatibility
BLUESHAPE CMDual battery adapter base