# EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh

EF ECOFLOW RIVER 3 Plus Extra Battery EB300 adds 286Wh of storage to a RIVER 3 Plus or can be used separately as a battery pack with a 140W USB-C port. It suits buyers seeking extra energy for compatible power-station use or portable charging for smaller devices, but it is an expansion battery rather than a standalone power station with a broad range of outputs.

- [Original product page](https://best-deals.pro/product/ef-ecoflow-river-3-plus-extra-battery-eb300)
- [View offer](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)
- Market: US
- Language: en-US
- Currency: USD
- Brand: EF ECOFLOW
- Model: EF-RV-E01-1
- Category: Tools & Garden > Power & Backup Energy > Expansion & Energy Storage Batteries
- Price: 135.15 USD
- Previous price: 159.00 USD
- Discount: 15%
- Price checked: 2026-11-14T09:43:12.383Z
- Rating: 4.9 / 5
- Reviews: 62

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Adds 286Wh when connected to a RIVER 3 Plus, for a stated combined capacity of 572Wh.
- Can be used independently through its 140W USB-C port for small-device charging and recharging the battery.
- When connected to the RIVER 3 Plus, the listing says it can charge using solar, AC power or a car.
- The manufacturer describes LFP chemistry and claims an IP65 rating, drop testing and protective monitoring.

## Pros

- Adds capacity to a compatible RIVER 3 Plus without extra connection cables or screws, according to the listing.
- Its USB-C port allows the battery to be used on its own for small-device charging.
- The listing describes three charging approaches when connected to the RIVER 3 Plus.

## Cons

- Standalone use is described through a single 140W USB-C port, so this is not presented as a multi-output power station when used on its own.

## Specifications

### Identity
- Brand: EF ECOFLOW
- Model: EF-RV-E01-1
### Power and battery
- Power configuration: Battery Powered
- Added energy storage: 286Wh
- USB-C port output: 140W
- Battery chemistry: LFP
### Dimensions and installation
- Dimensions listed: 9.2 x 8.8 x 4.3 inches
- Connection to RIVER 3 Plus: Simple pogo pin connection
### Charging and protection claims
- Charging methods: 3 Charging Methods
- Charge time when connected to RIVER 3 Plus: as fast as 1.5 hr
- Ingress protection rating: IP65
- Drop-test height claimed: 3.3 ft
- Casing rating: UL 94V-0-rated

## Before you buy

- The stated 1.5-hour charging time applies when connected to a RIVER 3 Plus. Solar, AC and car charging are also described for that connected setup. The listing's examples of 7.2 hours for a car fridge and 42 minutes for a travel kettle are usage claims, not universal runtimes.

## In the box

- RIVER 3 Plus Extra Battery EB300 (Included)
- Quick Start Guide (Check selected pack): Named in the feature text but not in the explicit included-components field.
- 5-Year Service (Check selected pack): Named in the feature text but not in the explicit included-components field.

## A good fit for

- RIVER 3 Plus owners who want to increase listed storage to 572Wh.
- Travelers or campers who want a separate battery pack with USB-C charging for smaller devices.
- Buyers seeking an expansion battery for compatible power-station use.

## Less suited to

- People seeking a standalone power station with multiple output types.
- Buyers who need a large-capacity battery without owning or planning to use a RIVER 3 Plus.

## Customer feedback

Customer feedback says the battery works as expected and highlights its engineering quality. The aggregate ratings are strongly positive, but ratings alone do not establish particular performance outcomes. For buyers using it as a RIVER 3 Plus expansion or for USB-C charging, confirm that the claimed capacity and connection meet the intended setup.
- Positive themes: Customers reportedly appreciate its functionality and engineering quality.

## Frequently asked questions

### Can the EB300 work without a RIVER 3 Plus?
The listing says it can be used independently through its 140W USB-C port for charging small devices and recharging the battery. The solar, AC and car charging methods are described when it is connected to a RIVER 3 Plus.
### How much capacity does it add to a RIVER 3 Plus?
The listing states that the EB300 adds 286Wh and brings the combined storage to 572Wh when paired with a RIVER 3 Plus.
### How does it connect to the RIVER 3 Plus?
The listing describes a pogo pin connection and says it stacks without extra cables or screws.
### What comes in the package?
The explicit included-components field names the RIVER 3 Plus Extra Battery EB300. The feature text also claims a Quick Start Guide and 5-Year Service, so check the selected listing for those items.

## Alternative options

- [EF ECOFLOW DELTA 3 Max Portable Power Station, 2048Wh LFP Battery, 2400W \| 3400W X-Boost Output, Ultra-Fast 0-80% Charging in 1.13 Hr, Home Backup & RV Camping, Solar Generator \(Solar Panel Optional\)](https://best-deals.pro/visit/ef-ecoflow-delta-3-max-portable-power-station)
- [EF ECOFLOW RIVER 2 240 Portable Power Station, 243Wh 300W \| LiFePO4 Battery, 1-Hour Fast Charge, 300W Up to 600W AC Outlets, Solar Generator for Camping/Outdoor](https://best-deals.pro/visit/ef-ecoflow-river-2-240-portable-power-station)
- [DARAN R200 Portable Power Station 192Wh, 200W\(400W Peak\) Compact Power Bank \| 100W PD Fast Charge, 2 AC Outlets, LiFePO4 Solar Generator with LED Light for Laptop, Camping, Hunting, Travel, Home Blackout](https://best-deals.pro/visit/daranener-daran-r200-portable-power-station-192wh-200w)
- [EF ECOFLOW Rapid 3-in-1 Portable Charger, 10,000mAh Power Bank with Built-in USB-C Cable and Foldable Wall Plug, 30W Max Battery Pack, Travel Essentials for iPhone 17/16/15 Series, Galaxy, MacBook](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)
- [EF ECOFLOW Laptop Power Bank, 25,000mAh 170W Portable Charger with Dual 140W USB-C Ports, Smart Display, Flight-Approved for Travel, Fast Charging for iPhone 17/16 Series, MacBook, Samsung and More](https://best-deals.pro/visit/ef-ecoflow-rapid-power-bank-25k-170w)
- [BLUETTI Elite 300 Portable Power Station for RV & Home Backup 3014.4Wh \| 2400W \(4800W Surge\), LiFePO4 Battery, Smallest 3kWh Solar Generator for Emergency, RV Power with TT-30 RV Port & 12V/30A DC](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)
- [Portable Power Station 1000W\(2000W Peak\), 576Wh LFP Battery Solar Generator \| 1.8H Fast Charging, Emergency Backup for Home Use, RV Camping, Road Trip \(Solar Panel Optional\)](https://best-deals.pro/visit/daranener-cubus1000l-1000w-portable-power-station)
- [Humsienk 50A 8AWG Expansion Cable for EcoFlow Delta 2/3 Series, 48V LiFePO4 Battery to Portable Power Station, Built-in Independent Power Management, Bidirectional Fast Charge](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)
- [EF ECOFLOW Solar Panel Mounting Z Brackets, for 100W Flat Stands 1 Set, 400W Flat Stands 2 Sets](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)
- [LIBRIDS Portable Power Station 640Wh, 1200W Surge, Solar Generator 4 AC \| Backup LiFePO4 Battery, 1.5Hr Charge, 10ms UPS, 8 Ports, Pure Sine Wave Metal Design for RV Camping, Home Backup & Emergency](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)
- [EF ECOFLOW Solar Generator DELTA 3 Classic with 220W Solar Panel, 1024Wh \| 1800W AC/100W USB-C Output, LFP Battery, 1 Hr Fast Charge, Solar Generator for Home & Outdoor \(Solar Charge Cable Included\)](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)
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## Add-ons

- [MRINCA Carrying Case Compatible with ECOFLOW RIVER 3/RIVER 3 Plus \| Portable Power Station Bag with Shoulder Strap, Protective Cover with Multiple Pockets & Quick Access for Accessories](https://best-deals.pro/visit/ef-ecoflow-river-3-plus-extra-battery-eb300)

## Images

![EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh — 1](https://best-deals.pro/i/luj5_Ok3eRlXsHWEPWnBtnThtEexfIOXPIVGwCPyv0K-gTFXTwZD8_owaj8qjXtFPFMy6ENMtgEDOnGB0LebClf1O6vinF3ZWTvvdnlO-laylgPyVAK2hRB1.jpg)

![EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh — 2](https://best-deals.pro/i/o8Cqpk9EbJRqX6sRqR1K-zzdH97vfjEDSrTf1-Uqjbp8fsgl8wZLwL04V8G8U3Sw0UA0jWxPaQF5xM_Ya1_F8aqtEB1uIt4M3G9JdAH0ICompDiGYpN4gZDV.jpg)

![EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh — 3](https://best-deals.pro/i/tt69FEFgrcu51A7tPSSeHz-8O6gk8k72eK8dEAqljRLsxsiyx0XyagsYzW3UbyDDemljlezXGYBklHBXkEvmcW-Ky5d-pQ565_CH_lBVkAqUB2a0ZtybYE7n.jpg)

![EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh — 4](https://best-deals.pro/i/pKNINraKvtEgd5xdfS8D66ccV1mPA572z6v2dtDMAnw7ggm4hhmqb_4ho_na3YBZlbvSsA8F3Bm-uaGtpg6Wgu2sS8a6K-9sIaP9nh_5Me72rEFmgy35-Jwr.jpg)

![EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh — 5](https://best-deals.pro/i/mLnsfp9zFboi7npZ-SfafxR_xPlwufNW_pj5EtT_wxQNFgjX3SCGJnaxLj4VRRAyiF_dgzVF1ILkRe0qz-U6EDG_4NR6pGF1DrxbwEqeIQq5dIye417MtgBg.jpg)

![EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh — 6](https://best-deals.pro/i/fsmUr6IRyfctdACTuHeL_a23_eMp-qvugrsJKoYCs67xBKxAAhrG2eXsMWfn5aw16U6OrOLS8V3NQFNtlgL3ru6nXMncvV5ur9vX0S_gNZFSNWZa8Z9V_1-t.jpg)

![EF ECOFLOW RIVER 3 Plus Extra Battery EB300, 286Wh — 7](https://best-deals.pro/i/rflH7J1K384ETfaeHLxNWtltGgM3ZShXJfZGVnV6iVhRw9LxC_2wnXksURHx3i_AnFuyOktdrEcVnPdH9sb7DTybQoa3g_m5ReoYWcPUIe40n__SeEwg4K1q.jpg)