SKU: 68558731004

EcoFlow RIVER 3 Plus Smart Extra Battery

Sale price$143.55 Regular price$159.50
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Ships within 48 hours · Estimated delivery Jul 30 - Aug 4

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Description

EcoFlow RIVER 3 Plus Smart Extra BatteryBoost the performance and runtime of your EcoFlow RIVER 3 Plus with this Smart Extra Battery. Designed for seamless expansion, it offers you the flexibility to increase total capacity to as much as 858Wh by choosing the EB300 (286Wh) or EB600 (572Wh) option. The advanced design supports an additional 140W USB C input output, ensuring faster charging and versatile connectivity. Adds an extra charging and recharging option More possibilities, more

Boost the performance and runtime of your EcoFlow RIVER 3 Plus with this Smart Extra Battery. Designed for seamless expansion, it offers you the flexibility to increase total capacity to as much as 858Wh by choosing the EB300 (286Wh) or EB600 (572Wh) option. The advanced design supports an additional 140W USB-C input/output, ensuring faster charging and versatile connectivity.

Adds an extra charging and recharging option

More possibilities, more flexibility

Looking to charge more devices or conveniently power your RIVER 3 Plus via USB-C? Adding this extra battery expands its capacity and significantly enhances its versatility with an extra 140W USB-C port, offering the RIVER 3 Plus a new charging and recharging option. With the USB-C port, the Extra Battery also provides the freedom to use it independently.

Hassle-free connection

Plug-and-play within seconds

Utilizing Pogo Pin tech, the batteries connect wirelessly, fastening easily with clips instead of cables or screws.

Lightweight at only 7.7 lb

Use the extra battery independently to lighten your load

Weighing just 7.7 lb, the EB300 is lighter than the RIVER 3 Plus. It is lightweight, with a compact design and USB-C input and output port, making the extra battery highly convenient for on-the-go use. The Extra Battery offers the perfect solution for short outdoor trips with minimal devices to expand your possibilities.

10-year lifespan with an LFP battery

A one-time investment that lasts for 10 years

The Extra Battery features the same LPF battery technology and offers a 5-year warranty, just like the RIVER 3 Plus. This ensures worry-free usage for up to 10 years, giving you peace of mind and long-lasting performance.

Features

  • Expand your RIVER 3 Plus power capacity up to a maximum of 858Wh
  • Select between EB300 (286Wh) or EB600 (572Wh) models to suit different power demands
  • Includes an extra 140W USB-C input/output port for fast and flexible charging
  • Quick Pogo Pin wireless docking—no tools, screws, or cables needed
  • Can function independently for reduced weight and increased portability

Specifications

General

  • Net Weight: 7.72 lbs
  • Dimensions (W x— D x— H): 9.21 in x— 8.82 in x— 4.33 in

Output

  • USB-C Port: 5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max
  • Extra Battery Port: 17.5V-25.5V⎓33A Max

Input

  • USB-C Port: 5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max
  • Extra Battery Port: 17.5V-25.5V⎓14A Max

Battery Details

  • Rated Voltage: 22.4⎓
  • Rated Capacity: 286Wh 12.8Ah
  • Cell Chemistry: LFP (LiFePO4)
  • Cycle Life: Maintains 80%+ State of Health after 3000 cycles at 0.5C/0.5C at 25°C (77°F)
  • Safety Protections: Over Voltage, Overload, Over Temperature, Short Circuit, Low Temperature, Low Voltage, and Overcurrent Protection

Environmental Conditions

  • Optimal Operating Temperature: 68°F - 86°F

  • Charging Temperature: 32°F - 113°F

  • Discharging Temperature: 14°F - 113°F

  • Storage Temperature: 14°F - 113°F (Optimal: 68°F - 86°F)

Warranty

Energy Systems Central Stores is an authorized retailer of EcoFlow products. Because of this, we pass on EcoFlow's manufacturer 5-Year warranty to you.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 68558731004

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4.3 ★★★★★
Based on 27 reviews
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Verified Purchase
Joel Viamonte
Houston, US
★★★★★ 5
I loved
Super good, it really keeps the cold well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
M
Verified Purchase
mitzuh jasso
Lowell, US
★★★★★ 5
Perfect Buy for you Hardworking Man/Women
I’ve bought my husband 3 of these already for work we love them easy to clean super durable perfect for his job. Keeps his coffee nice and hot and his chilled drinks nice and cool! We love it every chance we get we buy another one.
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Reviewed in the United States on January 11, 2026
I
Verified Purchase
Ilda Espana
Whiting, US
★★★★★ 4
Doesn’t maintain hot too long.
I love this cup because the material is good for heavy duty jobs like mine. I took off one star because it does keep hot but not for super long, it lasts hot for about 2-3 hours. Other than that it’s easy to wash and the magnet that comes on the cup is super strong which comes in handy for not loosing it. It magnetized on to the cup.
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Reviewed in the United States on October 28, 2025
A
Verified Purchase
Antonio Crissinger
Chelsea, US
★★★★★ 5
It's the best.
I'm picky on my coffee cups. Klien though has made a great cup for ones like me who work construction. This tumbler not only keeps your coffee hot, but is tough as hell. I can't count how many times it's fallen, dropped, or accidently kicked and still works like new. The rubber bottom and sides grip great. The magnet is strong and helps with tipping over, or possibly dropping. The locking lid also helps with spills.
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Reviewed in the United States on August 4, 2024
Y
Verified Purchase
1Yldkat
Massapequa, US
★★★★★ 5
Best tumbler I've ever owned
I use this tumbler as a travel cup for my coffee primarily. I have also drank cold beverages out of it. Both are satisfying experiences. Why does this product appeal to me so much that I would buy one, recieve it and then buy another? Because they got it RIGHT. They didn't waste time trying to put a handle on it that would be too big for some hands and too small for others. Instead, they put a grip surface on it that is comfortable and secure with or without gloves. A cup for all seasons and working men and women of America. The lid screws on, and the drink spout cover snaps in place open and closed. Even better, it doesn't rub on your nose when you drink out of it. Stainless steel inside and out, except for the thick lid and grip surface. Keeps coffee hot way longer than I'm used to, but don't know for sure how long because I don't waste much time drinking it. I have one for my truck and one for my Jeep so I'll never be without it. Yeah. Love it that much. I don't use the provided rare earth magnets for the cup, but I put them to good use elsewhere. I can see where they would come in handy in the construction or other trades. I use the cups on my commute, around the house, and while enjoying the outdoors. Keep up the good work, people!
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Reviewed in the United States on July 26, 2022

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