The  Bescor DTAP12V D-Tap to 12v Converter enables you to power your 12V video accessories using a 13 to 17V battery with a D-Tap connector. It converts the 13 to 17 volts to regulated 12V with a 2.1-amp rated draw. Use this converter with a D-Tap–equipped pro-style battery to obtain a longer run time than that provided by the camera's internal battery.
 
DO NOT EXCEED 25W LOAD, WILL CAUSE PERMANENT UNIT FAILURE.