About this item Work For VTOMAN OnlyThe Jump 1500 Extra Battery can be only used for VTOMAN portable power stations, including JUMP 1000, JUMP 1500X and JUMP 1800. Double Your Capacity At OnceVTOMAN Jump 1500 Extra Battery has a large capacity of 1548Wh. It can expand the capacity of Jump 1000 power station from 1408Wh to 2956Wh, expand Jump 1500 from 1548Wh to 3096Wh and Jump 1500X from 828Wh to 2376Wh. (Kindly note that the JUMP 1500 Extra Battery cannot be used alone, it has to connect with VTOMAN power stations to work) LFP Battery with BMSThe Jump1500 Expansion Battery is built-in durable LiFePO4(LFP) battery that features a lifespan of 3000 full cycles to 80% of its original capacity. LiFePO4 is also much safer and more durable than NCM batteries. Also the built-in BMS provides multiple protection for the battery, such as over-charge protection, over-discharge protection, over-voltage protection, short-circuit protection, etc. Money-saving SolutionThe expansion battery pr