The V-Gear VG-2KS Portable Li-ion V-Mount Dual Battery Charger is a portable intelligent Li-ion battery charger that has been designed to recharge two V-Lock type Li-ion batteries simultaneously. It also features a built-in 75W power supply that can be used as a camera or accessory power supply providing up to 4.5 amps. A major advantage of the new VG-2KS is that power can be supplied via the 4-pin XLR to power cameras and accessories, and in the event of a mains power failure, the VG-2KS will continue to supply power to your equipment from the batteries connected to the charging plates. (The optional VG-DCCABLE is required to enable DC-Output and DC UPS capabilities).