de.vtoman.com DE: Capacity Expansion: Compatible with Jump 1000/Jump1500X/Jump1800. Easily connect an extra battery with Jump1000/Jump1500X/Jump1800 through a cable and quickly add 1548wh capacity to your power station.Durable & Economical: Premium LPF batteries; 3100 + battery cycles (or 55000hours). Only $0.20 average cost per 1000wh.Super energy transfer: Almost no energy was wasted when transmitting from the extra battery to the power station.Ergonomics in Design: Set out with comfort, streamlined frame design and exceptionally solid handle. Thousands of ergonomics tests for top portability with MAX COMFORT.Super safety:With unique LifeBMS 10 protections, Vtoman Extra Battery is free from most safety problems, allowing absolute peace of mind.