SKU: 26784564705

EcoFlow DELTA 2 Max Smart Extra Battery

Sale price$314.55 Regular price$349.50
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

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Description

EcoFlow DELTA 2 Max Smart Extra BatteryBoost the runtime of your EcoFlow power system with the DELTA 2 Max Smart Extra Battery. Designed to connect seamlessly with DELTA 2, DELTA Max, and DELTA 2 Max power stations, it offers an additional 2048Wh of energy to support home backup, outdoor power, and off grid use. Featuring advanced LFP battery technology for a long service life and consistent performance, this expansion battery is a smart and budget friendly way to scale your energy

Boost the runtime of your EcoFlow power system with the DELTA 2 Max Smart Extra Battery. Designed to connect seamlessly with DELTA 2, DELTA Max, and DELTA 2 Max power stations, it offers an additional 2048Wh of energy to support home backup, outdoor power, and off-grid use. Featuring advanced LFP battery technology for a long service life and consistent performance, this expansion battery is a smart and budget-friendly way to scale your energy storage. Use the EcoFlow app for easy real-time monitoring and management — no complex setup required.

Expandable capacity

Increase the capacity of DELTA 2 Max with an extra 2048Wh.

Triple the power

2-6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to gain a capacity of 6144Wh, ideal for home backup, RVing, outdoor adventures, and everyday use. Much more affordable, it costs up to 30% less than a power station of the same capacity.

10-Year Long-lasting LFP Battery

Durable, Safe, Lightweight

With its upgraded LFP battery chemistry, the DELTA 2 Max Smart Extra Battery has a lifespan of 3000 complete cycles until it reduces to 80% capacity. You'll get pretty much 10 years of power, even if you use it every day. That's 6x— longer than other power stations with a similar capacity and output.

Easy to use

There's no setup. Just plug it into your power station for more energy storage. Using the EcoFlow app, you can charge and monitor the DELTA 2 Max Smart Extra Battery with ease.

Stackable, space-saving design

Featuring an ergonomic, compact design, the DELTA 2 Max Smart Extra Batteries can be securely stacked on top of power stations and each other to save space and minimize clutter.

Features

  • Expandable Storage Capacity — Adds an extra 2048Wh to DELTA 2, DELTA Max, and DELTA 2 Max models.
  • Up to 30% More Cost-Efficient — Expand power from 2-6kWh by linking up to two DELTA 2 Max Smart Extra Batteries for a total of 6144Wh storage capacity — with savings compared to buying a larger standalone power station.
  • Long-Lasting LFP Battery — Built for 10 years of daily use with over 3000 charging cycles, maintaining up to 80% of original capacity.
  • hassle-free setup — Plug-and-play design plus app control for easy monitoring and power management through the EcoFlow app.

Specifications

General

  • Model: EFD350-EB
  • Weight: 42 lbs
  • Dimensions: 18 in x 9 in x 11 in
  • Capacity: 2,048Wh

Input

  • Extra Battery Port Input: 51.2V = 2000W Max

Output

  • Extra Battery Port Output: 51.2V = 3,200W Max

Battery Details

  • Type: LFP (Lithium Iron Phosphate)
  • Cycle Life: 3,000 cycles to 820% + capacity (kept exactly as given)
  • Protection Systems:
  • Over Voltage Protection
  • Overload Protection
  • Over Temperature Protection
  • Short Circuit Protection
  • Low Temperature Protection
  • Low Voltage Protection
  • Overcurrent Protection

Operating Conditions

  • Optimal Operating Temperature: 68°F to 86°F
  • Discharge Temperature Range: 14°F to 113°F
  • Charging Temperature Range: 32°F to 113°F

Warranty

Energy Systems Central Stores is an authorized retailer of EcoFlow products. Because of this, we pass on EcoFlow's manufacturer 5-Year warranty to you.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 26784564705

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Nanou
Carnegie, US
★★★★★ 5
good toy for heavy chewers
Color: Blue Shark, Size: Medium
My dog loves this toy. It is tough and has a nice squeak. The only thing that bothers me a bit (it doesn't bother the dog) is the plastic tail gets rough with the chewing.
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Reviewed in the United States on June 11, 2026
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Jen
Birmingham, US
★★★★★ 5
Just buy it!!!!
Color: Blue Shark, Size: Medium, Color: Blue Shark, Size: Medium
5 stars so far! My beefy boy is obsessed with this toy. He’s a TOUGH chewer. It fits perfectly in his mouth and it’s definitely tough! Feels thick & sturdy, has no weird smell. He loves the squeaker and he’s been (trying) to tear it up non stop since I gave it to him! Lol. He wore himself out. Definitely ordering more. Love the different animals !
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Reviewed in the United States on June 11, 2026
R
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Rosemarie
Massapequa, US
★★★★★ 4
Durable and fun toy
Color: Blue Shark, Size: Medium
My granddog really likes this toy. He is a pit bull mix. The middle is where the squeaker is. Toy is hard plastic and he chewed on it a long time. No damage to toy! The only reason I gave it a 4 and not a 5 is how loud it is bouncing on wood floors. The toy I do recommend. Good size and bright blue color fish.
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Reviewed in the United States on June 5, 2026
C
Verified Purchase
Cheryl Otis
Waukegan, US
★★★★★ 5
TRULY INDESTRUCTIBLE!!!
Color: Blue Shark, Size: Medium, Color: Blue Shark, Size: Medium
This toy is truly indestructible. I have purchased several toys over the past few months, all have been detroyed except for this one. It may not look as pretty now but it is still intact and still squeaks. I highly recommend for anyone with truly aggressive chewers.
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Reviewed in the United States on May 29, 2026
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CHAOS
Waukegan, US
★★★★★ 5
Make sure you get this brand. The look alikes are trash!
Very durable and fun! My Pitbull chews on this constantly and loves to have treats or peanut butter, put in the bottom of it as an extra treat. A friend of mine bought a similar looking toy that was destroyed by her pitbull in moments. This one is better quality and has stood the test of this power chewer. The rubber is very thick and he chews it constantly but it stays in tact. It is soft enough to squeak if he gets a hold of it just right, but that’s the rare treat. The size is perfect for my 80 pound boy. I am also able to throw these toys in his pool for him to dive for them. Definitely in great value for the price.
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Reviewed in the United States on March 19, 2026

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