The EcoFlow River Expansion Battery is designed to integrate with the RIVER to increase the energy capacity of the unit. You can easily double the capacity of the RIVER from 288Wh to 576Wh by attaching the RIVER Extra Battery to the main model.
Easy Expansion: Adds an additional 288Wh (28.8V) to the River Portable Power Station
Integration: Easily attaches to the River in just 3 simple steps!
Lightweight: The EcoFlow River Expansion Battery only weighs 5.5 lbs!