Get U.S.-based product support from vehicle HVAC experts. We can help with compatibility, product selection, installation, and troubleshooting.
Contact an Expert
Shipping:
Most in-stock orders ship from our Costa Mesa, CA warehouse the same or next business day.
View Shipping Details
Warranty:
Products include manufacturer-backed warranty coverage. Terms vary by product and brand.
View Warranty Details
Returns:
Eligible unused items in their original packaging may be returned within 14 days of delivery. Terms and fees may apply.
View Return Policy
🔒
Secure Checkout:
Core Features & Benefits
Extra battery for EcoFlow River
*Please NOTE: This item is only applicable to orders in the US mainland states(except Hawaii, Alaska, Puerto Rico and Virgin Islands).
The EcoFlow River Extra Battery is designed to integrate with EcoFlow River to increase the energy capacity of the unit. You can easily double the capacity of the EcoFlow River from 288Wh to 576Wh by attaching the EcoFlow River Extra Battery to the main model. The EcoFlow River Extra Battery cannot be used separately.
Key Features of the Ecoflow River
Thanks to its smart X-Stream integrated inverter, the River can charge from 0% to 80% in only 1 hour. You can switch to a quieter charging condition by turning on the “Quiet Charging” status on the Ecoflow app.
The extra battery doubles the capacity from 288Wh to 576Wh for when you need more power, you can also detach the extra battery easily for more portability.
The Extra Ecoflow Battery
With the EcoFlow patented X-Stream Technology, the smart inverter enables fast recharging. Even after adding the Extra EcoFlow Battery to River, recharging time from an AC wall outlet remains the same. It’ll still take less than 1 hour to charge from 0%-80%, and fully charge in 1.6 hours.
EcoFlow River+ Extra Battery = EcoFlow River Max
After integrating the Extra Battery to a River unit, you will get the River Bundle which is monitored and managed as a whole by the BMS (Battery Management System) of the main model. It provides a cost-effective solution to upgrade your River in terms of storage. With a capacity of 576Wh, the River Bundle provides enough juice to run essential devices for hours.
Benefits of the River
Lightning-fast charging means that you can have an uninterrupted power supply anywhere you go.
Having more capacity gives you more energy to use between recharges cycles.
Faster charging means that you have less downtime, and more time powering your devices.
Technical Specifications
Net Weight
5.5 lbs (2.5kg)
Dimensions
11.2 x 7 x 2.3 in (28.5 x 18 x 5.9 cm)
Charge Temperature
32-113°F +/- 5°F (0-45°C +/- 3°C)
Discharge Temperature
-4-113°F +/- 5°F (-20-45°C +/- 3°C)
Color
Black
Capacity
288Wh (28.8V)
Cell Chemistry
Lithium-ion
Shelf Life
1 year (after fully charging the device)
Cycle Life
500 Cycles to 80%+ capacity
Testing and certification
UL Standard CE FCC RoHS RCM
Included with the EcoFlow River Portable Power Station:
I wanted the River Max, but decided to get the River instead. After a month of using, I decided to just get an extra battery, so happy this was an option!
