Extra Battery for EcoFlow DELTA 3 Plus (1024Wh)
The EcoFlow DELTA 3 Series Smart Extra Battery is an external 1,024Wh LiFePO₄ battery that adds storage to a compatible EcoFlow power station. Paired with a DELTA 3 Plus, it brings the nominal total to 2,048Wh. It plugs in with a connection cable and needs no internal work.
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Will This Battery Work With Your Power Station?
This battery is made for the EcoFlow DELTA 3, DELTA 3 Plus, DELTA 3 1500 and DELTA 2. Run this quick check before you buy.
This is an external expansion battery, not an internal replacement. The listing says it is only for the four power stations above, so do not assume it fits DELTA Pro models, DELTA 3 Classic or other EcoFlow series.
DELTA 3 Series 1024Wh Extra Battery Specifications
| Property | Detail |
|---|---|
| Brand / model | EcoFlow DELTA 3 Series Smart Extra Battery (EF-DL-E10-4; retail listings also show EF-DL-E10) |
| Chemistry | Lithium iron phosphate (LiFePO₄ / LFP), rechargeable |
| Rated capacity | 1,024Wh |
| Nominal voltage / capacity | 51.2V, 20Ah |
| Extra Battery Port output | 40–58.4V DC, 48A max |
| Extra Battery Port input | 40–58.4V DC, 24A max |
| Connection | EcoFlow Extra Battery Port (XT150) via the connection cable |
| Weight | Approx. 9.6kg |
| Dimensions (W × D × H) | Approx. 397.6 × 202 × 198mm |
| Cycle life rating | 80%+ capacity after 4,000 cycles |
| Optimal operating temperature | 20–30°C |
| Charging temperature | 0–45°C |
| Discharging temperature | −10–45°C |
| Storage temperature | −10–45°C |
| Protection functions | Overvoltage, overload, overtemperature, short circuit, low temperature, undervoltage, overcurrent |
| Controls / indicators | Power button and LED level indicator |
| Outputs on the battery | No AC or USB ports; devices plug into the power station |
| Monitoring | EcoFlow app, through the connected power station |
| Warranty | Five years advertised by EcoFlow; terms vary by region |
Capacity is a nominal rating, not a measured AC runtime. Some regional EcoFlow pages quote 3,000+ cycles or slightly rounded sizes. Values here follow EcoFlow’s technical specification.
Extra Battery Replacement Difficulty
Connecting or swapping the external battery is easy: it is plug-and-play with the supplied cable. The main work is confirming compatibility. Anything inside the power station is a job for EcoFlow support. Tap a slice to highlight it.
- 15% Switching off safely
- 25% Handling the 9.6kg unit
- 40% Checking compatibility
- 20% Connecting & confirming
Difficulty score and effort split are an editorial estimate based on the plug-and-play cable connection, not an official rating.
How to Connect or Swap the Extra Battery
Tap each step to tick it off as you go.
- 1Switch off and unplugTurn the power station off and disconnect its charging inputs and devices before you change any cable.
- 2Place the batterySet it on a stable, flat surface with good airflow, away from direct sunlight, heat and moisture. EcoFlow also shows it stacked on top of the power station.
- 3Remove the old battery (if swapping)Unplug its connection cable from both units, then move the old battery away.
- 4Connect the new batteryPlug the supplied connection cable into the Extra Battery port on the battery and on the power station. Push both ends in fully.
- 5Power up and checkSwitch the power station on and confirm the added capacity in the EcoFlow app or on the station display.
- 6Recharge as normalCharge the power station from a wall outlet, solar panels or an EcoFlow Smart Generator. The extra battery charges through it.
Check that the cable is pushed in at both ends, restart the power station and read any message in the EcoFlow app. If you notice unusual smells, sounds or heat, disconnect the battery and contact EcoFlow support.
Other Devices That Work With This Battery
This battery has no AC or USB ports. It pairs with the power stations below and recharges through them. Confirm your exact model in the EcoFlow manual first.
- DELTA 3Power station with expansion port
- DELTA 3 PlusPower station, 1,024Wh built in
- DELTA 3 1500Power station, 1,536Wh built in
- DELTA 2Power station, 1,024Wh built in
- Wall outletCharges through the power station
- Portable solar panelsCharges through the power station
- EcoFlow Smart GeneratorRecharge option listed by EcoFlow
- EcoFlow appMonitor and control the battery
Safety, Storage & Disposal
EcoFlow states that the DELTA 3 Plus is not intended to power life-sustaining medical equipment. For other medical devices, ask the device maker first.
- Keep the battery dry; no waterproof rating is stated.
- Charge within 0–45°C and store within −10–45°C.
- Do not use damaged cables, and do not open the battery yourself.
- Contact EcoFlow support for faults or service.
- Recycle it through a local battery collection point, never household trash.
Extra Battery for EcoFlow DELTA 3 Plus: FAQ
Is this the right extra battery for the EcoFlow DELTA 3 Plus?
Yes. EcoFlow lists it as an expansion battery for the DELTA 3 Plus and DELTA 3. The product listing also names the DELTA 3 1500 and DELTA 2.
How much capacity does it add?
It adds 1,024Wh. Together with the DELTA 3 Plus’s built-in 1,024Wh, the nominal total reaches 2,048Wh. Real runtime depends on the load and conditions.
Does it increase the power station’s output wattage?
No. It adds stored energy only. The power station’s own output rating still applies.
Can I plug devices straight into the extra battery?
No. It has no AC or USB ports. Plug your devices into the connected power station.
Does it work with the DELTA 3 Classic?
No. The DELTA 3 Classic has no extra battery port, so this battery cannot connect to it.
Can it replace the internal battery of my DELTA 3 Plus?
No. It is an external expansion battery that connects by cable and does not replace anything inside the power station. For an internal fault, contact EcoFlow support.
How is the extra battery charged?
Connect it to the power station, then charge the station. EcoFlow lists AC outlets, portable solar panels and its Smart Generator as recharge options.
How many charge cycles does it last?
EcoFlow’s technical specification states 80%+ capacity after 4,000 cycles. Some regional pages quote 3,000+ cycles. Treat the figure as a manufacturer rating rather than a guaranteed lifespan.
Is the extra battery waterproof?
EcoFlow does not give it a waterproof rating in the specification sources checked. Keep it dry.
What temperatures can it handle?
Charging is rated for 0–45°C, discharging for −10–45°C, and the best operating range is 20–30°C.