EcoFlow DELTA 3 Series Extra Battery review
EcoFlow DELTA 3 Series Smart Extra Battery (1,024Wh)
By Tom Calder
Key specs
The maker's figures.
- Capacity
- 1,024 Wh
- Fits
- EcoFlow DELTA 3, DELTA 3 Plus, DELTA 2 (not DELTA 3 Classic)
- Weight
- —
- Cycles
- —
- Battery
- LiFePO4
1,024Wh for the DELTA 3, DELTA 3 Plus and DELTA 2; the DELTA 3 Classic can't take it. EcoFlow's page gives two cycle figures, so we list neither.
- Best for
- Adding 1kWh to a DELTA 3 or DELTA 3 Plus
- Skip it if
- You own a DELTA 3 Classic or DELTA 3 Max
We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- 1,024Wh
- Fits the DELTA 3, DELTA 3 Plus and DELTA 2
Worth knowing
- Not for the DELTA 3 Classic
- Two different cycle figures on EcoFlow's page
ⓘ As an Amazon Associate, PreparedStates earns from qualifying purchases. We may earn a commission when you buy through our links. When two products are close, commission can decide which one we pick. A clearly better product always wins. Amazon prices come from Amazon's own product data and can change at any time.
Who shouldn't buy this
Don't buy it if you own a DELTA 3 Classic or DELTA 3 Max.
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the US price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for Doubling a RIVER 3 Plus to 572Wh
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Best for Adding 2kWh to a DJI Power 1000 V2 or 2000
as of Nov 14, 2026, 5:36 PM ET · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.Best for Doubling an Anker SOLIX C2000 Gen 2
See the comparison →