EcoFlow · Portable power station All-time low
EcoFlow DELTA 3 Series Smart Extra Battery
$389
$0.38 / Wh
$499
90-day median $409; all-time low $389 on 2026-07-07.
✓ In stock
✓ Price checked 2026-08-27
LFP · 4,000 cycles
| Capacity | 1,024 Wh |
|---|---|
| $/Wh today | $0.38 |
| Chemistry | LFP |
| Rated cycles | 4,000 (to 80%) |
| Weight | 21.1 lbs |
| Standalone use | No — link port only |
| Recharge without station | No — only through the station |
| Availability | In stock |
✓ Below the 90-day average
−$20
It's averaged $409 over the last 90 days. You're paying under the typical transaction price.
✓ At its all-time low
$389
The lowest price we've ever recorded for this model — matched today.
i Ignore the “list price”
$499 → $389
It shows −22% off list, but judge the deal against this model's own price history — not the sticker.
Full tech specifications 12 specs
Battery
| Chemistry | LFP‡ |
|---|---|
| Capacity | 1,024Wh |
| Rated cycles | 4000‡ |
Output
| AC outlets | 0 (link port only) |
|---|---|
| USB-C ports | 0 (link port only) |
| 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 |
General & physical
| Weight | 21.1‡ |
|---|---|
| Warranty | 5 years‡ |
‡ Sourced from EcoFlow's published tech specs; not independently verified. Core figures (capacity, chemistry, cycles, output) are editorially verified.
Price history — DELTA 3 Series Smart Extra Battery
Price history — (Members-only) DELTA 3 Series Smart Extra Battery
All configurations
| Configuration | Type | Price | Advertised | Deal | Stock |
|---|---|---|---|---|---|
| DELTA 3 Series Smart Extra Battery | Battery only | $389 | −22% | All-time low | ✓ |
| DELTA 3 Plus+DELTA 3 Series Smart Extra Battery | Bundle | $1,019 | −7% | Typical price | ✓ |
| DELTA 3+DELTA 3 Series Smart Extra Battery | Bundle | $969 | — | Good deal | ✓ |
| (Members-only) DELTA 3 Series Smart Extra Battery | Battery only | $409 | −18% | Above typical | ✓ |
$/Wh comparisons on this site use battery-only prices; bundles include solar panels or accessories whose value isn't reflected in battery capacity.