Details THE ECOFLOW DELTA 2 EXTRA BATTERY.The EcoFlow DELTA 2 extra battery doubles the capacity when connected to a EcoFlow DELTA 2 portable power station.This can have the effect of you increasing the batteries capacity from 1024Wh (standard) to 2048Wh (DELTA 2 x 1 DELTA Extra Battery). Or add on the EcoFlow DELTA Max Extra Battery to hit 3040WhEcoFlow DELTA 2 extra battery Capacity: 1024WhWHAT’S IN THE BOX?EcoFlow DELTA 2 Extra Battery. DELTA 2 Extra Battery Cable, User Manual. Additional Details EcoFlow DELTA 2 Extra Battery Hampshire Generators are the only UK EcoFlow supplier with factory trained engineers Battery capacity 1024Wh Doubles the capacity of the EcoFlow DELTA 2 Can increase the batteries capacity from 1024Wh to 2048Wh Silent & zero emissions rechargeable LFP (LiFePO4) battery Fast charging via mains, 12v car adapter or solar panel (optional) GENERAL INFO: Net Weight Approximately 9.5kg(21lbs) Dimensions 400 x 211 x 281mm(15.7x8.3x11.1in) Capacity 1024Wh 51.2V INPUT PORT: Extra Battery Port Input 51.2V 1024W Max (X-Stream and solar dual charging) OUTPUT PORT: Extra Battery Port Output BATTERY INFO: Cell Chemistry LFP (LiFePO4 battery) Cycle Life 3000 cycles to 80%+ capacity ENVIRONMENTAL OPERATING TEMPERATURE: Optimal Operating Temperature 20°C ~ 30°C (68°F ~ 86°F) Discharge Temperature -10°C ~ 45°C (14°F ~ 113°F) Charge Temperature 0°C ~ 45°C (32°F ~ 113°F) Storage Temperature -10°C ~ 45°C (14°F ~ 113°F) (optimal: 20°C ~ 30°C (68°F ~ 86°F)) Protection: Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection