EcoFlow DELTA Max Extra Battery. • Extra 2016Wh battery for DELTA Max. • Expand capacity up to 6kWh with 2 extra batteries. • Convenient recharging with DELTA Max: AC, solar, Smart Generator, car charging. Specifications. Net Weight. Approx. 40 lbs (18 kg). Dimension. 18.3 x 9.3 x 11.1 in (46.4 x 23.5 x 28.3 cm). Charge Temperature. 32 to 113°F ± 5°F (0 to 45°C ± 3°C). Discharge Temperature. -4 to 113°F ± 5°F (-20 to 45°C ± 3°C). Capacity. 2016Wh. Cycle Life. 800 Cycles to 80%+ capacity. Management Systems. BMS, Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection. Extra Battery Port Input. 50.4V, 1800W Max (X-Stream and solar dual charging). Extra Battery Port Output. 43V-58.4V 3200W Max. Cell Chemistry. NCM. Shelf Life. 1 year (after fully charging the device). Testing and certification. UL CE FCC ROHS Telec. Warranty. 24 months. Smart Generator. Supported (sold separately). Download. User manual