---
product_id: 690301739
title: "EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently"
brand: "ef ecoflow"
price: "£171.91"
currency: GBP
in_stock: true
reviews_count: 8
category: "Ef Ecoflow"
url: https://www.desertcart.co.uk/products/690301739-ef-ecoflow-river-3-plus-portable-power-station-extra-battery
store_origin: GB
region: United Kingdom
---

# 140W USB-C fast charge/discharge IP65 waterproof & rugged design 286Wh LiFePO4 battery capacity EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently

**Brand:** ef ecoflow
**Price:** £171.91
**Availability:** ✅ In Stock

## Summary

> 🔌 Power up your freedom—expand, charge, and conquer every adventure!

## Quick Answers

- **What is this?** EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently by ef ecoflow
- **How much does it cost?** £171.91 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/690301739-ef-ecoflow-river-3-plus-portable-power-station-extra-battery)

## Best For

- ef ecoflow enthusiasts

## Why This Product

- Trusted ef ecoflow brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built for the Wild:** IP65-rated waterproofing and drop-tested ruggedness mean this battery thrives outdoors, rain or shine, heat or drop.
- • **Decade-Long Durability:** LiFePO4 chemistry ensures 10 years of daily use with 6× longer lifespan than typical batteries, backed by advanced X-Guard protection.
- • **Fast & Flexible Charging:** Charge via USB-C, solar, AC, or car in as little as 1.5 hours—power that keeps pace with your lifestyle.
- • **Charge & Go, Independently:** Use the extra battery solo with its built-in 140W USB-C port—perfect for charging devices or recharging on the move without the main unit.
- • **Double Your Power On Demand:** Seamlessly stack the EB300 to boost your River 3 Plus capacity from 286Wh to 572Wh—more juice for longer adventures or emergencies.

## Overview

The EF ECOFLOW River 3 Plus Extra Battery EB300 is a 286Wh LiFePO4 portable power expansion pack designed to double your energy capacity with a simple stackable design. Featuring a robust IP65 waterproof rating, a built-in 140W USB-C port for fast charging and discharging, and a 10-year lifespan supported by advanced X-Guard safety technology, it offers reliable, long-lasting power for outdoor enthusiasts and emergency preparedness alike.

## Description

Perfect Mom Gift New Release: TRAIL Plus 300 Visit the Store New Release: TRAIL Plus 300 Visit the Store New Release: DELTA 3 1000 Air Visit the Store New Release: DELTA 3 1000 Air DELTA Series Visit the Store DELTA Series RIVER Series Visit the Store RIVER Series TRAIL SERIES Visit the Store TRAIL SERIES Solar Generator Visit the Store Solar Generator Power Bank Visit the Store Power Bank Solar Panel Visit the Store Solar Panel Smart Device Visit the Store Smart Device

Review: Good - Works as expected
Review: Couldn’t be easier. - Works exactly as advertised - plug and play for more run time.

## Features

- Expand Your Energy Storage: Add an extra 286Wh of energy storage to RIVER 3 Plus for 572Wh, perfect for increasing energy storage for outdoors or power outages. Run a car fridge for 7.2 hours or travel kettle for 42 min. With a simple pogo pin connection, stack the extra battery in seconds without extra cables or screws.
- Use Independently: Lighten your load and use the extra battery on its own without RIVER 3 Plus. Use its 140W USB-C port for charging small devices and recharging the battery when you're on the go.
- 10 Years of Daily Use: With LFP battery chemistry, the battery pack has a 6× longer life than the industry average. Using exclusive X-Guard, the extra battery is protected with real-time monitoring and 40 protective features including overheating and short circuit.
- Robust & Reliable: IP65 waterproof rating protects against water splashes, making it perfect for outdoor use. Designed to withstand extreme heat with a UL 94V-0-rated casing and has been rigorously drop tested up to 3.3 ft without damaging the battery.
- 3 Charging Methods: Charge the RIVER 3 Plus Extra Battery directly using its built-in USB-C port. Connect to the RIVER 3 Plus to charge using solar, AC outlet or by using your car in as fast as 1.5 hr.
- What's in the Box: RIVER 3 Plus Smart Extra Battery EB300 (286Wh), Quick Start Guide and 5-Year Service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DS2BWFN7 |
| Antenna Location | Power Tool |
| Best Sellers Rank | #19,841 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #46 in Outdoor Generators |
| Brand | EF ECOFLOW |
| Built-In Media | RIVER 3 Plus Extra Battery EB300 |
| Color | Black |
| Customer Reviews | 4.8 out of 5 stars 42 Reviews |
| Item Dimensions | 9.2 x 8.8 x 4.3 inches |
| Manufacturer | EF ECOFLOW |
| Mfr Part Number | EB300 |
| Model Name | EF-RV-E01-1 |
| Model Number | EF-RV-E01-1 |
| Number of Items | 1 |
| Number of Outlets | 1 |
| Other Special Features of the Product | Portable |
| Output Wattage | 140 |
| Power Source | Battery Powered |
| Recommended Uses For Product | Power Tool |
| Reusability | Rechargeable |
| Special Feature | Portable |
| UPC | 842783163493 |
| Unit Count | 1.0 Count |
| Warranty Description | 5 Year |

## Product Details

- **Brand:** EF ECOFLOW
- **Color:** Black
- **Power Source:** Battery Powered
- **Recommended Uses For Product:** Power Tool
- **Special Feature:** Portable

## Images

![EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently - Image 1](https://m.media-amazon.com/images/I/51L7FoQHVmL.jpg)
![EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently - Image 2](https://m.media-amazon.com/images/I/719OHlWBvRL.jpg)
![EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently - Image 3](https://m.media-amazon.com/images/I/71p9SeV4bcL.jpg)
![EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently - Image 4](https://m.media-amazon.com/images/I/7196lefkwhL.jpg)
![EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently - Image 5](https://m.media-amazon.com/images/I/71iNJyIL7KL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by A***B on March 18, 2026*

Works as expected

### ⭐⭐⭐⭐⭐ Couldn’t be easier.
*by S***S on December 19, 2025*

Works exactly as advertised - plug and play for more run time.

### ⭐⭐⭐⭐⭐ Dependable battery
*by A***R on July 3, 2025*

Battery extension works like it says gives you more time for usage of power station, charges fast and can be used separately as a stand alone power to charge a laptop or phone. Good for camping and road trips .I highly recommend.

## Frequently Bought Together

- EF ECOFLOW River 3 Plus Portable Power Station Extra Battery EB300, 286Wh Expansion LiFePO4 (LFP) Battery with 10-Year Lifespan, Built-in 140W USB-C Port for Charging/Discharging, Use Independently
- EF ECOFLOW Portable Power Station RIVER 3 Plus, 286Wh LiFePO4 Battery, 3 Up to 1200W AC Outlets, <10 MS UPS, Expandable to 858Wh, <30 dB Quiet, 1Hr Fast Charging Solar Generator for Outdoor Camping/RV
- EF ECOFLOW Portable Power Station RIVER 2, 256Wh LiFePO4 Battery/ 1 Hour Fast Charging, 2 Up to 600W AC Outlets, Solar Generator (Solar Panel Optional) for Outdoor Camping/RVs/Home Use

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**Shop now:** [https://www.desertcart.co.uk/products/690301739-ef-ecoflow-river-3-plus-portable-power-station-extra-battery](https://www.desertcart.co.uk/products/690301739-ef-ecoflow-river-3-plus-portable-power-station-extra-battery)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-05-16*