• EcoFlow RIVER 3 Plus Smart Extra Battery 300EB
  • EcoFlow RIVER 3 Plus Smart Extra Battery 300EB Back View
  • EcoFlow RIVER 3 Plus Smart Extra Battery 300EB back view close up
  • EcoFlow RIVER 3 Plus Smart Extra Battery 300EB front view close up
  • EcoFlow RIVER 3 Plus Smart Extra Battery 600EB left side view
  • EcoFlow RIVER 3 Plus Smart Extra Battery 600EB back left view
  • EcoFlow RIVER 3 Plus Smart Extra Battery 600EB back view
  • EcoFlow RIVER 3 Plus Smart Extra Battery 600EB front view
  • EcoFlow RIVER 3 Plus Smart Extra Battery 600EB side view
  • EcoFlow RIVER 3 Plus Smart Extra Battery 600EB in a living room
  • EcoFlow RIVER 3 Plus Smart Extra Battery 600EB inside the tent
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EcoFlow RIVER 3 Plus Smart Extra Battery

EcoFlow

$209.00
$209.00
In Stock — Ready to Ship
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Mfr. Warranty
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Product Details

The RIVER 3 Plus Smart Extra Battery doubles the RIVER 3 Plus's capacity from 286Wh to 572Wh — transforming a compact day-trip station into a multi-day power solution. The expansion battery connects to the RIVER 3 Plus's side port and charges simultaneously with the main unit, requiring no separate charging step or additional hardware.

Brand new in box

Brand new in box

5 year factory warranty

5 year factory warranty

Fast shipping (5–7 business days)

Fast shipping (5–7 business days)

Authorized EcoFlow dealer

Authorized EcoFlow dealer
  • Doubles RIVER 3 Plus from 286Wh to 572Wh — extends from day-trip to multi-day runtime
  • Compatible exclusively with the EcoFlow RIVER 3 Plus expansion port
  • LFP battery chemistry: 3,000+ cycles to 80%+ capacity for regular use longevity
  • Simultaneous charging with host station via AC, solar, or DC input
  • EcoFlow BMS manages charge balancing between station and extra battery automatically
  • Compact, lightweight form factor — minimal weight addition to an ultraportable system

General

  • Capacity: 572Wh

Battery

  • Battery Chemistry: LiFePO4, 3000 cycles to 80% capacity

Output

  • USB-C Output: 1 port, 5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max

Input

  • USB-C Input: 5V/9V/12V/15V⎓3A Max, 20V/28V⎓5A Max, 140W Max

Dimensions & Weight

  • Dimensions: 9.2 x 8.8 x 6.2 in
  • Net Weight: 12.8 lb>

This item comes with a 5-Year Factory Warranty from EcoFlow. A 3-Year Standard Warranty is included automatically from the date of original purchase, covering defects in materials, workmanship, and performance under normal use. An additional 2-Year Extended Warranty is available at no extra charge — activate it by downloading the EcoFlow App, logging into your EcoFlow account, and registering your product using the unit serial number within the standard warranty period. This gives you up to 5 years of total factory warranty coverage. Exclusions apply for damage caused by misuse, unauthorized modification, disassembly, or exposure to excessive heat or liquids. For warranty claims: support@ecoflow.com or 1-800-368-8604.