ZERO BREEZE 12 TO 24V CONVERTER FOR MARK 2

"The 12V to 24V DC-DC Converter is for charging the Mark 2 battery from a 12V power source. Input: 9-16V Output: 24V Max Power: 280W (It is the max capability it can transfer the power. It doesn't generate power.) There are two functional connectors, one is for a 12V car cigarette interface, and the other is for wiring directly to your 12V battery positive and negative electrodes."