Providing four independent Anton Bauer type charging ports, ikan's Quad Pro Battery Charger for AB Mount Batteries can charge four batteries simultaneously. The batteries can be different capacities, and need not be ikan branded batteries, although using this device to charge non-ikan branded batteries may void your batteries warranty. In addition to charging four batteries, you can also use the charger as an AC power supply, providing up to 4 amps of current at 15 volts DC. Please note the charger can be used either as a charger or a power supply, but not both at the same time. You select the charger's mode with a three position switch near the 4-pin XLR output.