Mounts directly to any Gold Mount on the camera for true perpetual, battery operation. Unlike stacking batteries one behind the other, electronics in the QR-HOTSWAP-GM allow for true hot swapping as either battery can be changed at any time. The circuitry automatically combines the output of both digital battery fuel gauges for accurate display in the cameras with the INTERACTIVE viewfinder features. Used with two DIONIC 90 or HC batteries, the lightweight (