Expandable Capacity â The EcoFlow DELTA 2 Max Smart Battery increases the capacity of the DELTA 2, DELTA Max, AND DELTA 2 Max with an extra 2048Wh. Triple the Power â 2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to hit a capacity of 6144Wh. Ideal for home backup, RVing, outdoors or even everyday use. Built to Last 6x Longer â Get 10 years of daily use until hitting 80% of its original capacity. That's down to its LFP battery chemistry giving you 3000+ cycles.5-Year WarrantySpecsCapacity: 2048WhInput Port: 51.2V, 2000W MaxOutput Port: 51.2V, 3200W MaxBattery: LFP chemistry, 3000 cycles to >80% capacityCompatible: DELTA 2, DELTA Max, DELTA 2 MaxDimensions: 18" x 9" x 11"Weight: 42 lbs. Ideal for home backup, RVing, outdoors, or even everyday use Get 10 years of daily use until hitting 80% of its original capacity 5-year warranty | Ecoflow Technology Ltd EcoFlow DELTA 2 Max Smart Extra Battery