EcoFlow DELTA 2 Max Smart Extra Battery

Name: EcoFlow DELTA 2 Max Smart Extra Battery
Brand: EcoFlow

Ranked #7 of 9 in Best Expansion Batteries for Power Stations: EcoFlow, Jackery, Anker, BLUETTI (2026). Here is every spec we scored, where it came from, and how it compares.

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EcoFlow DELTA 2 Max Smart Extra Battery

Best for: Adds 2 kWh to DELTA 2, DELTA Max or DELTA 2 Max

3.3/10

What we like

Fits three DELTA models
App monitoring
Can be charged on its own by an EcoFlow Smart Generator

Watch out for

No outlets of its own

Score breakdown

Capacity 45%

Energy per kg 35%

Cycle rating 20%

Capacity	2048 Wh
Energy per kg	107.8 Wh/kg
Cycle rating	3000 cycles
Capacity	2,048 Wh
Chemistry	LFP
Cycle rating	3,000 cycles to >80%
Fits	DELTA 2 (one pack), DELTA Max and DELTA 2 Max (up to two)
Weight	19 kg (42 lb)
Dimensions	464 × 235 × 283 mm
Price	Check price