The EcoFlow RIVER extra battery can double the capacity when connected to a EcoFlow RIVER portable power station. This has the effect of you increasing the batteries capacity from 288Wh (standard) to 576 Wh (RIVER extra battery). EcoFlow RIVER extra battery Capacity: 288Wh. Features: Battery capacity 288Wh Doubles the capacity of the EcoFlow RIVER Increase the batteries capacity from 288Wh to 576Wh Silent & zero emissions rechargeable lithium-ion battery Fast charging via mains, 12v car adapter or solar panel (optional) Specifications: Dimensions: H:5.9 x W:28.5 x D:18.5 cm Colour: Black Guarantee:2 years Material: Plastic Casing / Aluminium Chassis Model Number: ECOREB
