The EcoFlow RIVER 3 EB600 Extra Battery is a 572 Wh expansion pack that lifts a RIVER 3 Plus power station from 286 Wh up to 858 Wh of combined usable storage. At 5.6 kg it is the larger of the two RIVER 3 add-ons and measures 23.4 x 22.4 x 15.8 cm, keeping the stack tall but still narrow enough to fit under a bench or in a van locker. A dedicated 140 W USB-C output on the pack itself allows it to work on its own as a heavy-duty fast-charging brick when the main station is not in reach. The LiFePO4 cells are rated for 3000 cycles to 80% capacity, which translates to roughly a decade of daily cycling.

• 572 Wh of LFP storage that triples a RIVER 3 Plus reserve to a combined 858 Wh
• 3000 cycles to 80% capacity for a long, planned service life
• 140 W USB-C output so the pack can fast-charge devices as a stand-alone unit
• 23.4 x 22.4 x 15.8 cm footprint that stacks directly under the base station
• 5.6 kg weight kept low enough to lift and reposition in one hand
• LiFePO4 chemistry chosen for its long life and stable thermal behaviour
• 5-year warranty aligned with the RIVER 3 Plus platform

Key specs

• Capacity: 572 Wh
• Chemistry: LiFePO4 (LFP)
• Cycle life: 3000 cycles to 80% capacity
• USB-C output: 140 W max
• Weight: 5.6 kg
• Dimensions: 23.4 x 22.4 x 15.8 cm
• Discharge temperature: -10 °C to 45 °C
• Charge temperature: 0 °C to 45 °C
• Warranty: 5 years

A logical choice for van life, longer campsite stays, or a home backup that needs to power a fridge and small appliances through an evening rather than just an hour or two.