ArkPak Bundle with free USB light Add a standard 12V marine or RV battery to the ArkPak to create a portable power pack with up to 130ah of capacity Built-in 150W inverter provides standard 120VAC power for cell phone chargers, laptops, and most standard camping refrigerators Two built-in 12V sockets provide power to most 12V appliances as well as cell phone car chargers, portable coolers, and more Includes a 6 amp, 7 stage smart charger and battery management display that indicates battery charge status, remaining capacity, and current voltage. Using the included 12V car charger, the ArkPak can be used as a secondary battery for your vehicle (dual battery system)