EcoFlow · Portable power station Above typical
EcoFlow RIVER 3 Plus Smart Extra Battery - Recommended Accessory
$159
$0.56 / Wh
90-day median $139; all-time low $139 on 2026-07-07.
✓ In stock
✓ Price checked 2026-08-27
LFP · 3,000 cycles
| Capacity | 286 Wh |
|---|---|
| $/Wh today | $0.56 |
| Chemistry | LFP |
| Rated cycles | 3,000 (to 80%) |
| Standalone use | Yes — USB-C 140W |
| Recharge without station | No — only through the station |
| Availability | In stock |
i Above its typical price
$139
It's averaged $139 over the last 90 days. You're currently paying above the 90-day norm.
i Above its all-time low
$139
Its lowest recorded price was $139 on 2026-07-07.
i Ignore the “list price”
$159
Judge the deal against this model's own price history — not the sticker.
Full tech specifications 11 specs
Battery
| Chemistry | LFP |
|---|---|
| Capacity | 286Wh |
| Rated cycles | 3000‡ |
| Max expanded | 858‡ |
Output
| AC outlets | 0 (link port only) |
|---|---|
| USB-C ports | 1× 140W |
| USB-A ports | 0 (link port only) |
| 12V / car output | 0 (link port only) |
Input & charging
| AC input | None — recharges via the station only |
|---|---|
| Solar (PV) input | None — recharges via the station only |
| Car input | None — recharges via the station only |
‡ 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 | — | Above typical | ✓ |
| 600EB | Battery only | $249 | −22% | All-time low | ✓ |
$/Wh comparisons on this site use battery-only prices; bundles include solar panels or accessories whose value isn't reflected in battery capacity.