SKU: 26784564705

EcoFlow DELTA 2 Max Smart Extra Battery

Sale price$314.55 Regular price$349.50
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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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Brit_Abroad747
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★★★★★ 5
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Nice watch, light in weight. Looks good with the grey background. Has the day and date too, just wish they were a little larger, for easier reading.
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Reviewed in the United States on September 24, 2025
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Amazon Customer
Alexandria, US
★★★★★ 5
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Love it. Very nice looking and seems to keep time well. Incredible value!!!! I really enjoy wearing this watch!
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Reviewed in the United States on September 26, 2025
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Maidelyn Diaz
Charlottesville, US
★★★★★ 5
Es muy elegante
Color: 3316:white band white dial
The OUPINKE Automatic Two-Tone Skeleton Watch is a stylish timepiece that blends luxury design with mechanical craftsmanship. Its gold and silver stainless steel construction gives it an elegant, premium look suitable for both formal and casual occasions. Design & Appearance: This watch stands out with its two-tone bracelet and gold-accented bezel, creating a bold and sophisticated aesthetic. The dial features crystal-style hour markers, multiple subdials, and a visible skeleton window at the bottom that showcases the internal movement. These details add a high-end feel often associated with more expensive watches. Movement & Performance: It uses an automatic mechanical movement, which means it winds itself through the motion of your wrist—no battery required. This is a major advantage for watch enthusiasts who appreciate traditional watchmaking. The watch also includes useful calendar features such as day, date, and month indicators. Build Quality: The stainless steel case and bracelet feel solid and durable. The polished finish enhances its luxury appeal, although like most polished watches, it may show fingerprints or small scratches over time. Comfort: Despite its robust design, the watch is comfortable to wear. The bracelet is well-balanced, and the clasp keeps it secure on the wrist.
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Reviewed in the United States on February 18, 2026
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GJK
Boise, US
★★★★★ 5
Exceptional quality
I have only had the watch for a few days, but Oupinke watches are very high quality. It keeps time very well and serves as an attention grabber. Great value for the money. It isn't easy to determine where it was made, but it is a Chinese company. Don't stop there with preconceived ideas about cheap products and low quality from China. These watches are exceptional, high-end, and dedicated to creating a brand that endures and stands for quality, rather than simply turning a profit. I would put this watch against those that cost 3-4 times as much. If you are a watch enthusiast, they are worth adding to your collection.
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Reviewed in the United States on June 17, 2025
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Scott Mead
Alexandria, US
★★★★★ 5
Value
Color: GZ3255Z:Two tone band&Blue dial
Higher quality than I expected, especially for the price. I have recieved lots of compliments, but I have never told anyone what I paid for it. I use it for a daily wear, and when I go out for dinner.
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