Expansion battery entity · 1.02 kWh LiFePO4 expansion · Status unclear

EcoFlow DELTA 2 Smart Extra Battery

Name: EcoFlow DELTA 2 Smart Extra Battery
Brand: EcoFlow

1,024 Wh LiFePO4 add-on battery for the EcoFlow DELTA 2, 9.5 kg, the smallest and lightest unit in this family. Charges only through the host and has no outlets. Release status is unclear: the US product page is delisted, so specs come from EcoFlow's Canada and UK pages plus the official manual.

brand: EcoFlow family: DELTA 2 capacity: 1024 Wh confidence: medium updated: Aug 15, 2026

This battery only works with the hosts named below. An expansion battery only enlarges a specific host power station. It is not a general-purpose battery and, on its own, usually has no inverter and no outlets at all. Compatibility below is recorded verbatim from the manufacturer and is never inferred from a matching connector, a shared brand or a similar capacity: pairing one with a host it was not built for can damage equipment. Capacity shown is this unit's own, never a combined station-plus-expansion system total.

Manufacturer product image, from EcoFlow. Shown for identification only; specifications come from the sources listed below.

Machine summary · expansion_battery · ecoflow-delta-2-smart-extra-battery

brand: EcoFlow
model_name: DELTA 2 Smart Extra Battery
release_status: unclear
chemistry: lifepo4
capacity_wh: 1024
compatible_host_models: EcoFlow DELTA 2
has_own_outlets: false
weight_kg: 9.5
confidence_level: medium
source_last_checked: 2026-08-15
json_export: /expansion-batteries/ecoflow-delta-2-smart-extra-battery.json

Overview

The EcoFlow DELTA 2 Smart Extra Battery is a 1,024 Wh LiFePO4 add-on that roughly doubles the storage of an EcoFlow DELTA 2. At 9.5 kg it is the smallest and lightest expansion battery indexed here. It has no outlets and charges only through its host; one extra battery connects per DELTA 2. Its US market availability is unclear: the US product page returns a 404 and appears delisted, so the specifications here come from EcoFlow's Canada and UK product pages and the official user manual, and releaseStatus is recorded as unclear rather than asserted either way. EcoFlow publishes no amp-hour figure for its extra batteries, so capacityAh is null; the nominal voltage is 51.2 V. Warranty is not published for this unit. A variant hazard applies: the DELTA Max Smart Extra Battery (2,016 Wh) also lists the DELTA 2 as a compatible host, but it is a different, larger SKU and is not merged into this record.

Variant note: DELTA 2 Smart Extra Battery (ZMR330EB), 1,024 Wh, for the EcoFlow DELTA 2. Distinct from the DELTA Max Smart Extra Battery (2,016 Wh), which also lists the DELTA 2 as a host.

Data note: SKU ZMR330EB. RELEASE STATUS UNCLEAR by decision: the US product page (us.ecoflow.com/products/delta-2-smart-extra-battery) returns 404 and appears delisted, so releaseStatus is recorded as unclear and marketRegion as CA/UK rather than US. officialProductUrl retains the US URL as the canonical product identity even though it currently 404s; the working sources are EcoFlow's Canada and UK product pages and the official manual PDF. confidenceLevel is medium (not high) because the canonical US source is gone and specs come from other-region pages plus the manual. No merchant is recorded: there is no reliable US purchase path, so WhereToBuy renders nothing (same treatment as other entities with no purchase path). capacityWh is this unit's own 1,024 Wh; EcoFlow publishes no amp-hour figure, so capacityAh is null and the Ah x V check does not apply. warrantyYears is null (unpublished). cycleLifeCycles is null (no DoD-qualified figure published). officialCompatibilityStatement is a faithful paraphrase of the sourced host naming on the CA/UK pages and manual; the exact verbatim string was not captured in this pass (see provenance). VARIANT HAZARD: the DELTA Max Smart Extra Battery (2,016 Wh) also lists DELTA 2 as a host but is a different, larger SKU and must not be merged.

Specifications

Host compatibility leads this table because it is what makes an expansion battery meaningful, and it is recorded verbatim from the manufacturer and never inferred. The capacity shown is this unit's own rated energy, not a combined host-plus-expansion system total. Any cycle-life figure carries the depth of discharge it is quoted at, and figures the manufacturer does not publish are left blank rather than estimated. Exact claims and links are in the provenance table.

Host compatibility
Attribute	Value
Official compatibility statement	Compatible with the EcoFlow DELTA 2
Host models named by the manufacturer	EcoFlow DELTA 2
Expansion units the host supports	Up to 1

Capacity (this unit only)
Attribute	Value
Rated energy	1,024 Wh
Nominal voltage	51.2 V
Chemistry	LiFePO4 (lithium iron phosphate)

Integration
Attribute	Value
Outlets on the expansion unit itself	None. It adds capacity to the host and has no output ports of its own
Direct charging inputs	None direct: charges through the host DELTA 2 only. It has no AC or solar input of its own.

Cycle life
Attribute	Value
Rated cycle life	No cycle-life figure published

Temperature
Attribute	Value
Charge temperature range	0 °C to 45 °C (32 °F to 113 °F)
Discharge temperature range	-10 °C to 45 °C (14 °F to 113 °F)
Storage temperature range	-10 °C to 45 °C (14 °F to 113 °F)

Physical
Attribute	Value
Weight	9.5 kg (20.9 lb)
Dimensions (L × W × H)	400 × 211 × 281 mm

Model & availability
Attribute	Value
Release status	Status unclear
Market region	CA, UK

Use cases

Roughly doubling an EcoFlow DELTA 2's storage for camping or short outages
Buyers who want the lightest expansion battery here, where one-person portability matters more than capacity

Strengths and weaknesses

Strengths

Lightest and smallest expansion battery indexed here at 9.5 kg
LiFePO4 chemistry with capacity, weight and dimensions published
Simple single-battery pairing with the DELTA 2

Weaknesses

US market availability is unclear: the US product page is delisted
No warranty figure is published for this unit
No outlets and no direct charging: it works only through a DELTA 2
EcoFlow publishes no amp-hour figure and no depth-of-discharge cycle rating

Sources and provenance

Core specifications come from official manufacturer sources only, with the exact claim text preserved per field. Spec sheets and manuals outrank marketing copy. See the methodology for the full policy.

Field-level provenance (8 entries, checked 2026-08-15)
Field	Normalized value	Raw claim	Source	Confidence
`chemistry`	lifepo4	LiFePO4	Official manual (PDF) — Chemistry is well established from the manual even though US availability is unclear.	high
`capacityWh`	1024	1024Wh	Official manual (PDF) — This unit's own energy. NOT a combined-system total.	high
`nominalVoltageV`	51.2	51.2V	Official manual (PDF) — EcoFlow publishes no amp-hour rating, so capacityAh is null.	high
`weightKg`	9.5	—	Official manual (PDF) — Published weight 9.5 kg; sourced via EcoFlow CA/UK pages and the manual (research handoff, 2026-08-15). Medium because the US canonical page is delisted.	medium
`dimensionsMm`	[400,211,281]	—	Official manual (PDF) — 400 x 211 x 281 mm; sourced via research handoff (2026-08-15).	medium
`officialCompatibilityStatement`	Compatible with the EcoFlow DELTA 2	—	Official manual (PDF) — The DELTA 2 is named as the host on EcoFlow's CA/UK pages and in the manual. Recorded as a faithful paraphrase; the exact verbatim string was not captured in this pass, which is part of why confidence is medium.	medium
`compatibleHostModels`	["EcoFlow DELTA 2"]	DELTA 2	Official manual (PDF) — Single host. One extra battery per DELTA 2.	medium
`chargeTempRangeC`	[0,45]	—	Official manual (PDF) — Charge 0 to 45 C, discharge -10 to 45 C, storage -10 to 45 C; sourced via research handoff (2026-08-15).	medium

All sources used

entity: expansion_battery/ecoflow-delta-2-smart-extra-battery source_last_checked: 2026-08-15 confidence_level: medium methodology: /methodology/