EcoFlow RIVER 3 Plus Smart Extra Battery
The EcoFlow RIVER 3 Plus Smart Extra Battery 300 EB is a compact battery expansion module designed exclusively for the EcoFlow RIVER 3 Plus Portable Power Station. Featuring a 286Wh LiFePO₄ battery, it increases the RIVER 3 Plus's total capacity to 858Wh, allowing users to power devices for longer without sacrificing portability. The battery connects effortlessly using EcoFlow's wireless Pogo Pin connection, eliminating the need for cables or screws. It also adds an additional 140W USB-C input/output port, providing greater charging flexibility for laptops, smartphones, tablets, and other USB-C devices. Whether you're camping, traveling, working remotely, or preparing for emergencies, the Smart Extra Battery offers a seamless way to extend runtime and expand your portable power system.
EcoFlow RIVER 3 Plus Smart Extra Battery Features
- Expand Capacity to 858Wh - Increase the total capacity of the EcoFlow RIVER 3 Plus from 286Wh to 858Wh, significantly extending runtime for essential appliances and electronics.
- 286Wh LiFePO₄ Battery - Built with a 286Wh lithium iron phosphate (LiFePO₄) battery, providing long-lasting performance, enhanced safety, and thousands of charging cycles.
- Wireless Pogo Pin Connection - The Smart Extra Battery connects instantly to the RIVER 3 Plus using EcoFlow's wireless Pogo Pin connection, requiring no cables, screws, or complicated installation.
- Additional 140W USB-C Input & Output - Adds an extra 140W USB-C port that supports both charging and powering compatible USB-C devices, making the battery useful even when used independently.
- Standalone USB-C Power Bank Functionality - The Smart Extra Battery can be used independently as a portable USB-C battery pack, allowing you to charge laptops, phones, tablets, cameras, and other USB-C devices without connecting it to the RIVER 3 Plus.
- Compact & Stackable Design - Designed to integrate perfectly beneath the RIVER 3 Plus, maintaining a clean, space-saving footprint while increasing available battery capacity.
EcoFlow RIVER 3 Plus Smart Extra Battery Applications
- Camping & Outdoor Adventures – Extend your portable power supply for lighting, cooking devices, fans, cameras, and other outdoor essentials.
- RV & Van Life – Increase battery capacity for longer off-grid stays while powering laptops, phones, lighting, and other travel essentials.
- Emergency Backup Power – Keep critical devices charged during power outages by expanding the runtime of your RIVER 3 Plus.
- Remote Work – Power laptops, monitors, smartphones, and networking devices during outdoor work sessions or temporary workspaces.
- Photography & Content Creation – Recharge cameras, drones, lighting equipment, and accessories while shooting on location.
- Travel – Carry additional portable battery capacity without significantly increasing system size or weight.
- Everyday USB-C Charging – Use the built-in 140W USB-C port to charge compatible laptops, tablets, smartphones, and accessories directly from the extra battery.
What's Included
Everything you need is included with your product.
- EcoFlow RIVER 3 Plus Smart Extra Battery (EB300)
- User Manual
EcoFlow RIVER 3 Plus Smart Extra Battery Specifications
Extra Battery 300
| Specification | Details |
| 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 |
Frequently-Asked Questions
What power station is this battery compatible with?
The Smart Extra Battery 300 EB is designed exclusively for the EcoFlow RIVER 3 Plus Portable Power Station and is not compatible with other EcoFlow models.
How much capacity does it add?
The battery adds 286Wh of capacity, allowing the RIVER 3 Plus to reach a total capacity of 858Wh.
How does the battery connect?
It connects using EcoFlow's wireless Pogo Pin connection, eliminating the need for external cables or screws.
Can I use the extra battery by itself?
Yes. The Smart Extra Battery can operate independently as a USB-C battery pack, allowing you to charge compatible devices through its built-in 140W USB-C input/output port.
Does the battery increase AC output power?
No. The Smart Extra Battery increases battery capacity and runtime only. The AC output capability remains dependent on the connected RIVER 3 Plus power station.
Is the battery safe for everyday use?
Yes. It uses LiFePO₄ battery technology, known for its long lifespan, enhanced thermal stability, and improved safety compared to conventional lithium-ion batteries.