The QBH-HD quad battery holder is a unit that allows four Anton Bauer batteries to be affixed in order to combine their power into one source. This source is capable of powering a 200 Joker, and even has the appropriate 2-pin Amphenol output for the Joker ballast to plug straight in. In addition, there are three 4-pin XLR outputs to power camera accessories or anything else that runs off XLR. The 2-pin Amphenol runs at 28.8 volts, while the XLR’s run at 14.4 volts, and both will output as such simultaneously. The QBH-HD is a great solution any time you need a small, portable, silent power source in a location where standard AC power isn’t readily available.