GIVE DAD THE GIFT OF POWER  |  SHOP EXCLUSIVE FATHER’S DAY DEALS >>
GIVE DAD THE GIFT OF POWER  |  SHOP EXCLUSIVE FATHER’S DAY DEALS >>
Skip to content

EcoFlow DELTA 3 Series Smart Extra Battery

by EcoFlow
SKU: EFDELTA3P-EB
Sold out
$599.00

Found a Lower Price?

Send it to us and we'll beat it. We'll get you exactly what you need at the lowest price online. Fast, friendly, and guaranteed!

Availability: Translation missing: en.general.icons.icon_check_circle icon Out of stock

Notify me when available

Friendly Lifetime Support

Friendly Lifetime Support

Unlimited expert service

Price Beat Promise

Price Beat Promise

Guaranteed lowest prices online

Free No-Risk Returns

Free No-Risk Returns

Guaranteed free for 30 days

Fast & Free Shipping

Fast & Free Shipping

On every product storewide

Supercharge Your EcoFlow DELTA 3 Series Power Station With The DELTA 3 Smart Extra Battery

The EcoFlow DELTA 3 Series Smart Extra Battery is designed to seamlessly pair with the DELTA 3 Plus, DELTA 3, and DELTA 3 1500 power stations. This extra battery boosts your energy reserves by an impressive 1024Wh, giving you more power for longer durations. With advanced LFP battery chemistry, a robust 5-year warranty, and intuitive app controls, this battery offers unmatched convenience and durability.

This extra battery isn’t just about adding capacity—it’s about adding freedom and security. Whether you’re tackling unpredictable weather, extending your camping trips, or staying prepared for emergencies, the DELTA 3 Smart Extra Battery ensures you have the power you need, whenever you need it.


EcoFlow DELTA 3 Series Smart Extra Battery Features

Extended Energy Reserves for Long-Lasting Power

Expand your energy capacity by 1024Wh, making it ideal for extended camping trips, prolonged power outages, or off-grid living. Stay powered up without worrying about running out of energy.

Durable Battery Chemistry for 10 Years of Reliability

With advanced LFP technology, this battery delivers over 3,000 charging cycles, ensuring up to 10 years of dependable use. Enjoy unmatched safety, stability, and long-lasting performance.

Seamless Integration with DELTA 3 Systems for Effortless Use

Experience plug-and-play convenience with no complex setup required. The EcoFlow app allows you to monitor and control energy usage for optimal power management anytime, anywhere.

Rugged Design Built for Any Environment

Engineered to handle tough conditions, this battery is ready for your adventures. Whether at home or outdoors, its durable construction ensures reliable performance every time.


EcoFlow DELTA 3 Series Smart Extra Battery Warranty

EcoFlow provides a 5-year warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.


What's Included

  • 1 x EcoFlow DELTA 3 Series Smart Extra Battery
  • 1 x EcoFlow DELTA 3 Extra Battery Cable
  • 1 x Manual
  • 1 x Warranty Card


EcoFlow DELTA 3 Series Smart Extra Battery Specifications

General Specifications

Weight 9.6 kg | 21.2 lb
Dimensions (W×D×H)  397.6 × 202 × 198 mm | 15.7 × 8.0 × 7.8 in

Output Specifications

Extra Battery Port 40V-58.4V⎓48A Max

Input Specifications


Extra Battery Port 40V-58.4V⎓24A Max

Battery Information

Rated Capacity 1024Wh (51.2V⎓20Ah)
Cell Chemistry LFP (LiFePO₄)
Cycle Life 80%+ capacity after 4000 cycles
Protection Type Over Voltage Protection, Overload Protection, Over Temperature Protection,
Short Circuit Protection, Low Temperature Protection,
Low Voltage Protection, Overcurrent Protection

Temperature Specifications

Optimal Operating Temperature 20°C-30°C (68°F-86°F)
Charge Temperature 0°C-45°C (32°F-113°F)
Discharge Temperature −10°C to 45°C (14°F-113°F)
Storage Temperature −10°C to 45°C (14°F-113°F)


EcoFlow DELTA 3 Series Smart Extra Battery Manual

EcoFlow_DELTA_3_Series_Smart_Extra_Battery_Manual

Customer Reviews

Based on 3 reviews
67%
(2)
33%
(1)
0%
(0)
0%
(0)
0%
(0)
K
Keith S.
Delta 3 extra battery

So far so good. It's on stand-by for when the power goes out or I'm in the north forty and need electric.

Hi Keith,

Thank you for your feedback. We're glad to hear your Delta 3 extra battery is working well and ready to provide power when you need it—whether during outages or when you're out in the north forty. Your satisfaction is our priority, and if you ever have questions or need assistance, please don't hesitate to reach out.

Thanks for choosing Outbound Power!

J
Jon A.
Outboundpower pulled through

Outbound Power filled an order that the manufacturer messed up. I had to cancel thenorder with the manufacturer and look elsewhere. I needed this product badly, and Outbound Power came through where the manufacturer themselves couldn't. Great job!

Thank you for sharing your experience! We're glad we could step in when the manufacturer couldn't meet your needs (Fulfilling the EcoFlow DELTA 3 Series Smart Extra Battery order). It's our mission to ensure our customers get what they need, and we're happy to have been able to help in a pinch. If there's anything else we can do for you, please don't hesitate to reach out. Thanks for choosing Outbound Power!

J
Jon A.
The perfect add-on

I recently bought an EcoFlow Delta 3 Plus and quickly realized that I needed more power. I purchased the Smart Extra Battery to extend the time of use. I have other EcoFlow power stations with extra batteries, but the Delta 3 Plus Smart Extra Battery was surprisingly small compared to the other models extra batteries. The other models have almost identical size and design as the main power station. The Delta 3 Plus Extra Battery is significantly smaller in size with a matching sleek design. This is great when transporting or storing them together.

I did capacity tests over several days, and they both (together) exceeded my expectations. The Smart Extra Battery has no fans, so it is absolutely quiet. Along with the Delta 3 Plus which in itself is extremely quiet, a great pair.

Why 4 stars? For one reason only. EcoFlow makes this Smart Extra Battery pretty dumb as it is totally useless without the Delta 3 Plus. They could have added some DC 12V and USB ports so it could be used without the Delta 3 Plus. Other brands make their extra batteries really smart and useful with DC power output adding value and use to the product. It still gets a solid 4 stars for performance.

Thank you for sharing your detailed feedback on the EcoFlow Delta 3 Plus and the Smart Extra Battery. We're glad to hear that you appreciate the compact and sleek design of the extra battery—it’s great when functionality meets convenience, especially for transportation and storage. Your insight comparing it to other models is very valuable to us and other customers. If you have any questions or need further assistance as you continue using your system, please feel free to reach out. Thank you for choosing Outbound Power!