Anton Bauer QR HOTSWAP
Mounts directly to the camera for true, continuous battery operation. Unlike "stacking" batteries one behind the other, electronics in the QR HOTWSWAP allow either battery to be changed at anytime. The circuitry automatically combines the output of both digital battery fuel gauges for accurate display in cameras incorporating InterActive viewfinder features. Can be used with Dionic 90 or Hytron 50 batteries only.