EcoFlow · Portable power station All-time low
EcoFlow RIVER 3 Plus Smart Extra Battery
$159
$0.56 / Wh
90-day median $159; all-time low $159 on 2026-07-07.
✓ In stock
✓ Price checked 2026-08-27
LFP
| Capacity | 286 Wh |
|---|---|
| $/Wh today | $0.56 |
| Chemistry | LFP |
| Weight | 7.7 lbs |
| Standalone use | Yes — USB-C 140W |
| Availability | In stock |
i Around its typical price
$159
It's averaged $159 over the last 90 days.
✓ At its all-time low
$159
The lowest price we've ever recorded for this model — matched today.
i Ignore the “list price”
$159
Judge the deal against this model's own price history — not the sticker.
Full tech specifications 6 specs
Battery
| Chemistry | LFP |
|---|---|
| Capacity | 286Wh |
Output
| USB-C ports | 1× 140W |
|---|---|
| USB-C max | 140W‡ |
General & physical
| Weight | 7.7 lbs‡ |
|---|---|
| Dimensions | 9.2 x 8.8 x 4.3 in‡ |
‡ Sourced from EcoFlow's published tech specs; not independently verified. Core figures (capacity, chemistry, cycles, output) are editorially verified.
Price history — 300EB
Price history — 600EB
All configurations
| Configuration | Type | Price | Advertised | Deal | Stock |
|---|---|---|---|---|---|
| 300EB | Battery only | $159 | — | All-time low | ✓ |
| 600EB | Battery only | $249 | −22% | All-time low | out of stock |
$/Wh comparisons on this site use battery-only prices; bundles include solar panels or accessories whose value isn't reflected in battery capacity.