EcoFlow RIVER 3 Plus Smart Extra Battery (600)

Name: EcoFlow RIVER 3 Plus Smart Extra Battery (600)
Brand: EcoFlow

Ranked #9 of 9 in Best Expansion Batteries for Power Stations: EcoFlow, Jackery, Anker, BLUETTI (2026). Here is every spec we scored, where it came from, and how it compares.

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EcoFlow RIVER 3 Plus Smart Extra Battery (600)

Best for: A clip-on pack that doubles as a 140 W USB-C power bank

1.2/10

What we like

Works as a stand-alone 140 W USB-C bank
Clips on with no cables

Watch out for

RIVER 3 Plus only
Small capacity

Score breakdown

Capacity 45%

Energy per kg 35%

Cycle rating 20%

Capacity	572 Wh
Energy per kg	98.5 Wh/kg
Cycle rating	3000 cycles
Capacity	572 Wh (the smaller Extra Battery 300 is 286 Wh)
Chemistry	LiFePO4
Cycle rating	3,000 cycles to 80%
USB-C	140 W in/out
Fits	RIVER 3 Plus (Pogo-pin clip-on)
Weight	12.8 lb
Warranty	5 years
Price	Check price