EcoFlow RIVER 3 Plus Smart Extra Battery EB300 – 286Wh LiFePO4 Expansion Battery

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EcoFlow RIVER 3 Plus Smart Extra Battery EB300 – 286Wh LiFePO4 Expansion Battery with 140W USB-C

Expand the runtime and flexibility of your EcoFlow RIVER 3 Plus Portable Power Station with the EcoFlow RIVER 3 Plus Smart Extra Battery EB300. Designed exclusively for the RIVER 3 Plus, this compact 286Wh LiFePO4 expansion battery increases your total system capacity to 572Wh while adding an additional 140W USB-C input/output port for even greater charging versatility.

Featuring EcoFlow's innovative wireless Pogo Pin connection, the EB300 attaches securely without cables or screws. It can also be used independently through its integrated USB-C port, making it an ideal lightweight power companion for travel, camping, and everyday portable charging.

Key Features

Designed for the EcoFlow RIVER 3 Plus
Expands total system capacity to 572Wh
286Wh LiFePO4 battery
Additional 140W USB-C input and output
Wireless Pogo Pin connection
Cable-free clip-on installation
Can be used independently via USB-C
Lightweight 7.7 lb design
Compact and travel-friendly
LiFePO4 battery rated for 3,000 cycles to 80% capacity
Manufacturer states up to a 10-year lifespan
5-year manufacturer warranty

Expand Your Power Capacity

The EB300 Smart Extra Battery adds 286Wh of additional energy storage to your EcoFlow RIVER 3 Plus.

When connected to a compatible RIVER 3 Plus, total available capacity increases to:

572Wh

The modular design allows a simple capacity upgrade without replacing your existing power station.

More Charging Flexibility

Unlike a traditional expansion battery, the EB300 adds another charging option.

Its integrated 140W USB-C port functions as both:

USB-C output for powering compatible devices
USB-C input for charging or recharging

This additional USB-C connection also allows the battery to be used independently when portable USB-C power is all that's needed.

Wireless Pogo Pin Connection

EcoFlow's Pogo Pin technology creates a clean, cable-free connection between the battery and the RIVER 3 Plus.

Benefits include:

No cables
No screws
Quick installation
Secure clip-on attachment

Lightweight Portable Design

Weighing only 7.7 pounds, the EB300 is lighter than the RIVER 3 Plus power station.

Its compact size makes it easy to:

Carry
Store
Travel with
Use independently for smaller charging tasks

Long-Life LiFePO4 Battery

The EB300 uses LiFePO4 (LFP) battery chemistry, providing long service life and dependable performance.

According to the manufacturer:

Rated for 3,000 charge cycles to 80% capacity
Designed for up to 10 years of use
Backed by a 5-year manufacturer warranty

Specifications

Brand: EcoFlow
Model: RIVER 3 Plus Smart Extra Battery EB300
Product Type: Expansion Battery
Compatible Power Station: EcoFlow RIVER 3 Plus
Battery Capacity: 286Wh
Expanded System Capacity: 572Wh (when connected to RIVER 3 Plus)
Battery Chemistry: LiFePO4 (LFP)
Battery Life: 3,000 cycles to 80% capacity
Dimensions: 9.2 × 8.8 × 4.3 in.
Weight: 7.7 lb
Connection Type: Wireless Pogo Pin
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
Warranty: 5-Year Manufacturer Warranty
Condition: New

What's Included

1 × EcoFlow RIVER 3 Plus Smart Extra Battery EB300
Wireless clip-on connection hardware (integrated)

Note: The supplied product information references "What's in the box" but does not specify additional included accessories beyond the battery itself.

Ideal For

Expanding EcoFlow RIVER 3 Plus capacity
Camping
RV travel
Emergency backup power
Outdoor adventures
Portable USB-C charging
Remote work
Photography
Mobile workstations
Everyday portable power

Why It Stands Out

The EcoFlow RIVER 3 Plus Smart Extra Battery EB300 is more than a capacity expansion—it also adds another high-power USB-C charging solution while maintaining an exceptionally compact, lightweight design.

Key advantages include:

Expands RIVER 3 Plus to 572Wh
High-performance 286Wh LiFePO4 battery
Additional 140W USB-C input/output
Wireless Pogo Pin connection
Cable-free installation
Standalone USB-C power capability
Lightweight 7.7 lb design
Compact travel-friendly size
3,000-cycle battery life
5-year manufacturer warranty

Its combination of expandable energy storage, premium battery technology, and versatile USB-C functionality makes it an excellent companion for EcoFlow RIVER 3 Plus owners.

Frequently Asked Questions

Which power station is the EB300 compatible with?

The EB300 is designed for the EcoFlow RIVER 3 Plus.

How much capacity does it add?

It provides 286Wh of additional battery capacity.

What is the total capacity after expansion?

When connected to a compatible EcoFlow RIVER 3 Plus, the total system capacity becomes 572Wh.

Can the battery be used independently?

Yes.

According to the manufacturer, the integrated 140W USB-C port allows the battery to be used independently for compatible USB-C devices.

How does it connect to the power station?

It uses wireless Pogo Pin technology with clip-on attachment, eliminating the need for cables or screws.

Does it include USB-C charging?

Yes.

The battery includes one 140W USB-C port that supports both input and output.

What battery chemistry does it use?

The EB300 uses LiFePO4 (LFP) battery technology.

How long is the battery expected to last?

According to the manufacturer, the battery is rated for 3,000 charge cycles to 80% capacity and is designed for up to 10 years of use.

How much does it weigh?

The EB300 weighs 7.7 pounds.

What warranty is included?

The manufacturer provides a 5-year warranty.