· Capacity Expansion: Compatible with Jump 1000/Jump1500X/Jump2200. Simply connect an additional battery to the Jump1000/Jump1500X/Jump1800 via a cable and quickly add 1548 Wh of capacity to your power station.
 · Robust and economical: High-quality LPF batteries; More than 3,100 battery cycles (or 55,000 hours). Average cost of only $0.2 per 1,000 Wh.
 · Super energy transfer: Almost no energy loss when transferring from the extra battery to the power station.
 · Ergonomic Design: With comfort, slim frame design and extremely solid grip. Thousands of ergonomic tests for maximum portability with MAX COMFORT.
 · Maximum safety: Thanks to the unique LifeBMS 10 protection functions, the Vtoman Extra battery is largely free from safety issues and offers absolute safety.