EcoFlow RIVER 3 Plus Extra Battery EB300 | 286Wh
Overview
The EcoFlow RIVER 3 Plus Smart Extra Battery EB300 adds 286Wh of additional capacity to your EcoFlow RIVER 3 Plus Portable Power Station, doubling total capacity from 286Wh up to 572Wh combined. It connects in a wire-free stacked configuration with no cables or screws.
The EB300 uses EcoFlow's wire-free Pogo Pin connection to attach directly to the bottom of the RIVER 3 Plus, and adds an extra 140W USB-C port to the system. At only 3.5kg, it is lighter than the RIVER 3 Plus itself, so it can also be used on its own as a standalone 286Wh battery via its built-in 140W USB-C port for phones, tablets, and laptops. The EB300 does not provide AC output by itself, only USB-C.
EB300 Extra Battery Specs:
- Capacity: 286Wh
- Weight: Approx. 3.5kg
- Dimensions: 234 x 224 x 110mm
- Chemistry: Lithium Iron Phosphate (LiFePO4 / LFP)
- Cycle Life: 3000 cycles to 80% capacity
- USB-C Port: 140W max (input and output)
- Total Output Power: 140W
- Connection to RIVER 3 Plus: Wire-free Pogo Pin
- Standalone Use: Yes, via USB-C port (no AC output by itself)
- Compatible With: RIVER 3 Plus only
What's in the Box?
- 1 x EcoFlow RIVER 3 Plus Smart Extra Battery EB300 (286Wh)
- 1 x User Manual
- 1 x Warranty Card
- Warranty: 5-year warranty
Note: No charging cables are included. The EB300 charges via its USB-C port using a compatible USB-C charger (sold separately) or via its Pogo Pin connection when stacked on a RIVER 3 Plus.
Double the Energy for Your RIVER 3 Plus
The RIVER 3 Plus has a standalone capacity of 286Wh. Add the EB300 and you get 572Wh combined, double the energy storage for longer outages, weekend off-grid trips, or running essential devices through a working day. The RIVER 3 Plus supports one extra battery at a time, so if you want the maximum capacity upgrade you can step up to the EB600 (572Wh) instead.
An Extra Charging and Recharging Option
The EB300 adds a 140W USB-C port to your RIVER 3 Plus system, giving you another way to charge devices and another way to recharge the battery itself. Plug a compatible 140W USB-C charger into the EB300 to top it up, or use the same port as a power output for phones, tablets, laptops, drones, and other USB-C devices.
Hassle-Free Wire-Free Connection
The EB300 connects to the RIVER 3 Plus using EcoFlow's Pogo Pin technology. No external cables, no screws, no tools. Align it with the RIVER 3 Plus, clip it on until it clicks, and you are ready to go in under 10 seconds.
Lightweight at only 3.5kg
At just 3.5kg, the EB300 is lighter than the RIVER 3 Plus itself. Use it on its own as a standalone 286Wh USB-C battery for shorter trips, day hikes, or when you only need to power a few essentials. Lightweight, compact, and convenient to throw in a pack.
Built to the Same Quality Standard
The EB300 uses the same LiFePO4 battery chemistry as the RIVER 3 Plus, with 3000 cycles to 80% capacity (around 10 years of everyday use before noticeable degradation). It carries the same 5-year warranty as the RIVER 3 Plus, so you can rely on consistent, long-lasting performance from both units.
Pairs Well With
The EB300 is designed exclusively for the EcoFlow RIVER 3 Plus Portable Power Station. If you want a larger capacity upgrade, the EcoFlow RIVER 3 Plus EB600 Smart Extra Battery (572Wh) doubles the EB300's capacity and takes total system capacity to 858Wh.
Frequently Asked Questions
What is the EcoFlow EB300 and what does it do?
The EB300 is a 286Wh Smart Extra Battery designed exclusively for the EcoFlow RIVER 3 Plus Portable Power Station. It connects to the bottom of the RIVER 3 Plus using a wire-free Pogo Pin connection, doubling total system capacity from 286Wh up to 572Wh. It also adds an extra 140W USB-C port and can be used on its own as a standalone USB-C battery.
Can the EB300 power AC devices by itself?
No. The EB300 can be used separately through its built-in 140W USB-C port for phones, tablets, laptops, and other compatible USB-C devices, but it does not provide AC output by itself. For AC output, the EB300 needs to be connected to the RIVER 3 Plus.
Is the EB300 compatible with other EcoFlow power stations?
No. The EB300 is designed exclusively for the EcoFlow RIVER 3 Plus and uses a wire-free Pogo Pin connection unique to the RIVER 3 series. It is not compatible with the DELTA series, the original RIVER series, or any other EcoFlow power stations.
How do I charge the EB300?
The EB300 has two charging options. When stacked on the RIVER 3 Plus, it charges through the Pogo Pin connection whenever the RIVER 3 Plus is plugged into AC, solar, or car charging. Used standalone, it charges via its built-in 140W USB-C port using a compatible USB-C charger (sold separately).
What warranty does the EcoFlow EB300 have in NZ?
The EcoFlow RIVER 3 Plus EB300 Smart Extra Battery includes a 5-year warranty in New Zealand.