EcoFlow RIVER 3 EB300 Smart Extra Battery
Add 286Wh and a 140W USB-C option to a compatible RIVER 3 Plus setup.
- 286Wh extra capacity — the lighter RIVER 3 Plus expansion option
- Wire-free pogo-pin connection — stacks without a cable between host and battery
- 140W USB-C input and output — adds a useful high-power USB-C option
- Independent USB-C use — EcoFlow notes it can reduce your carry load
- 3.5kg class weight — easier to travel with than the larger EB600
Use with a compatible main unit. Compatibility should be checked before ordering.
Out of stock
Is this expansion battery right for you?
Good fit if:
- You own or plan to buy RIVER 3 Plus
- You want a small runtime upgrade
- You value a lighter battery module
- You want added USB-C charging flexibility
Not ideal if:
- You need standalone AC output
- You want the maximum RIVER 3 Plus capacity
- You own a different EcoFlow host model
RIVER 3 EB300 at a Glance
A Closer Look at the RIVER 3 EB300
EB300 is the tidy expansion choice. It keeps the RIVER 3 Plus system compact and adds useful runtime without turning it into a heavy 1kWh-class setup.
The key limitation is AC output: EB300 does not replace the host station. Use it to add battery time, not as a separate mains power source.
Why it works for your setup
286Wh extra capacity
the lighter RIVER 3 Plus expansion option
Wire-free pogo-pin connection
stacks without a cable between host and battery
140W USB-C input and output
adds a useful high-power USB-C option
Independent USB-C use
EcoFlow notes it can reduce your carry load
3.5kg class weight
easier to travel with than the larger EB600
No standalone AC output
AC sockets remain on the RIVER 3 Plus host
Why Buy From VoltReady™
UK-Based Business
VoltReady is a UK-based portable-power specialist serving customers across the United Kingdom.
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Products include manufacturer-backed warranty cover, with the exact terms shown clearly on each product page.
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Everything important, clearly organised
Key Features
Technical Specifications
What’s in the Box
FAQs
How much capacity does EB300 add?
It adds 286Wh to a compatible EcoFlow RIVER 3 Plus setup.
Does it need a cable to connect?
EcoFlow describes a wire-free pogo-pin connection with RIVER 3 Plus.
Can it be used independently?
EcoFlow notes independent use for the USB-C function, but it is not a standalone AC power station.
Should I choose EB300 or EB600?
Choose EB300 for lower weight and compact use. Choose EB600 for longer runtime.
Does it add AC sockets?
No. AC output still comes from the RIVER 3 Plus host.
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