EcoFlow · Batteries
EcoFlow RIVER 3 Plus Extra Battery EB300 (286 Wh)
Works with
RIVER 3 Plus
EcoFlow RIVER 3 Plus Extra Battery EB300 (286 Wh): compare specifications and model compatibility. View expansion battery details, photos and support information at 326energy.
Use
What it adds
The EcoFlow RIVER 3 Plus Smart Extra Battery EB300 adds 286 Wh of LiFePO4 capacity directly beneath the RIVER 3 Plus portable power station, doubling total energy storage to 572 Wh without external jumper cables.
Using EcoFlow's wireless Pogo Pin bottom-stacking interface, the EB300 locks onto the base of the RIVER 3 Plus in seconds. It also features its own bidirectional 140W USB-C input/output port, allowing the module to operate as a standalone high-capacity USB-C power bank for laptops, tablets, and camp lighting when detached from the main station.
Compatibility
Product details
- Brand
- EcoFlow
- Category
- Batteries
- Compatible with
- RIVER 3 Plus
- Weight
- 7.7 lb / 3.5 kg
- Dimensions
- 9.2 × 9.1 × 3.2 in (234 × 232 × 82 mm)
- Model
- EF-RV-E01-1 (EB300)
- Capacity
- 286 Wh
- Cell chemistry
- LiFePO4 (LFP)
- Cycle life
- 3,000 cycles to 80%+ capacity
- Connection interface
- Wireless Pogo Pin bottom stack
- Standalone port
- 1 × USB-C In/Out (5V/9V/12V/15V⎓3A, 20V/28V⎓5A, 140W Max)
- Charge temperature
- 0°C to 45°C (32°F to 113°F)
- Discharge temperature
- -10°C to 45°C (14°F to 113°F)
In action
Reference setups & real-world use
572 Wh Home Office & Router UPS Stack
Clipped directly beneath the RIVER 3 Plus via wireless Pogo Pins to keep a laptop, Wi-Fi router, and desk monitor running through an evening outage without external jumper cords.
Standalone 140W USB-C Power Bank Mode
Detaches from the main station to fast-charge laptops and camp lanterns directly through its built-in 140W bidirectional USB-C port.
Highlights
Why it's worth it
- Adds 286 Wh of LFP capacity to the RIVER 3 Plus, scaling total system capacity to 572 Wh
- Cable-free Pogo Pin clip-on mounting — stacks flush under the station with no external cords to snag
- Built-in 140W bidirectional USB-C port lets you charge the battery or power laptops independently
- Long-life LiFePO4 (LFP) battery chemistry rated for 3,000+ cycles to 80% capacity
- Ultra-compact 7.7 lb (3.5 kg) footprint fits easily into a backpack, trunk, or camp bin
- Monitored and managed through EcoFlow X-Guard BMS and the EcoFlow mobile app when docked
In the box
What's included
- EcoFlow RIVER 3 Plus Smart Extra Battery EB300 (286 Wh)
- Quick Start Guide & Safety Instructions
Keep browsing
More compatible accessories
EcoFlow RIVER Extra Battery (288 Wh)
Works with: RIVER (original)
Doubles the original EcoFlow RIVER capacity from 288 Wh to 576 Wh. Bolts directly to the underside of the first-generation RIVER chassis with the included hardware for a single-handle, cable-free setup.
EcoFlow RIVER 3 Plus Extra Battery EB600 (572 Wh)
Works with: RIVER 3 Plus
Adds 572 Wh of LiFePO4 capacity to the RIVER 3 Plus, tripling total system storage to 858 Wh. Clips beneath the station via wireless Pogo Pin contacts and features a built-in 140W bidirectional USB-C port for standalone use.
EcoFlow RIVER Pro Extra Battery (720 Wh)
Works with: RIVER Pro
Doubles EcoFlow RIVER Pro capacity from 720 Wh to 1,440 Wh in a matching portable form factor. Connects via the included expansion cable and charges or discharges in sync with the host station.