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Expandable up to 858Wh with 2 Extra batteries options
Adjust capacity for growing energy needs
Level up your RIVER 3 Plus with an Extra Battery. Choose either the EB300 (286Wh) or the EB600 (572Wh), and simply stack one at a time to achieve up to 858Wh of pure energy.
![](http://us.ecoflow.com/cdn/shop/files/d0e3ee4524ed7b5c292ca1fccfe89a23.png?v=1733810849&width=2000)
Adds an extra charging and recharging option
More possibilities, more flexibility
Looking to charge more devices or conveniently power your RIVER 3 Plus via USB-C? Adding this extra battery expands its capacity and significantly enhances its versatility with an extra 140W USB-C port, offering the RIVER 3 Plus a new charging and recharging option. With the USB-C port, the Extra Battery also provides the freedom to use it independently.
![](http://us.ecoflow.com/cdn/shop/files/Adds_an_extra_charging.png?v=1733811203&width=2000)
Hassle-free connection
Plug-and-play within seconds
Utilizing Pogo Pin tech, the batteries connect wirelessly, fastening easily with clips instead of cables or screws.
![](http://us.ecoflow.com/cdn/shop/files/Hassle-free_connection_484d4f0b-2e5c-462f-833e-1ff701d41c13.png?v=1733810934&width=2000)
Lightweight at only 7.7 lb
Use the extra battery independently to lighten your load
Weighing just 7.7 lb, the EB300 is lighter than the RIVER 3 Plus. It is lightweight, with a compact design and USB-C input and output port, making the extra battery highly convenient for on-the-go use. The Extra Battery offers the perfect solution for short outdoor trips with minimal devices to expand your possibilities.
![](http://us.ecoflow.com/cdn/shop/files/Charge_up_fast_and_everywhere_9193a985-167c-44ba-ab40-9d60e14aef3d.jpg?v=1733811341&width=2000)
10-year lifespan with an LFP battery
A one-time investment that lasts for 10 years
The Extra Battery features the same LPF battery technology and offers a 5-year warranty, just like the RIVER 3 Plus. This ensures worry-free usage for up to 10 years, giving you peace of mind and long-lasting performance.
![](http://us.ecoflow.com/cdn/shop/files/Charge_up_fast_and_everywhere_1.jpg?v=1733811437&width=2000)
Extra Battery 300
Specs
Capacity
286Wh
Dimensions
9.2 x 8.8 x 4.3 in
Net Weight
7.7 lb
Battery Chemistry
LiFePO4, 3000 cycles to 80% capacity
USB-C Output
1 port, 5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max
USB-C Input
5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max
Extra Battery 600
Specs
Capacity
572Wh
Dimensions
9.2 x 8.8 x 6.2 in
Net Weight
12.8 lb
Battery Chemistry
LiFePO4, 3000 cycles to 80% capacity
USB-C Output
1 port, 5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max
USB-C Input
5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max