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 30 - Aug 4

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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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Caro Montes
Chelsea, US
★★★★★ 5
Highly Recommend to anyone going through family conflicts
Format: Hardcover
I love all of Nedra’s books. I highly recommend this book to anyone who has family conflicts that are taking a toll on them. It teaches you how to set proper boundaries and understand the situation and your feelings.
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Reviewed in the United States on May 25, 2026
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Jeremy and Elizabeth
Draper, US
★★★★★ 5
Practical Read for Managing Challenging Family Dynamics
Format: Hardcover
I found this text easy to read and a helpful way to reflect on my childhood experience and the relationships I have with my family members. The strategies are easy to implement.
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Reviewed in the United States on January 21, 2026
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Diane Burroughs
Lowell, US
★★★★★ 5
Drama Free For Sure!
Format: Kindle
Nedra Glover Tawwab is a New York Times bestselling author, a licensed therapist, and a sought-after relationship expert. This book is a therapeutic and educational tool that addresses how to consciously change behaviors you’d rather not have in relationships, specifically, around your family. For those of us who have delved into the self-help book world, this is an in-depth, thorough refresher, focusing on family dynamics. Nedra’s core belief is that relationships contribute to mental health. They can cause you pain or they heal you. She focuses on taking your relationships seriously and teaches the art of having tough but intentional conversations to create positive change. OR you’ll learn how to sever ties when the relationship is unmanageable. None is more influential than the formative years we’ve had with our family of origin. A lot of people lament that not everything is about the family, but yup, so often it’s true. In childhood, most likely we weren’t allowed to be ourselves, so our true selves started to develop when becoming an adult. Like a butterfly using its colossal strength to break out of its chrysalis, we too must use our emotional colossal strength to break out of our childhood mold in order to fly. We are able to have relationships with family on our terms.
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Reviewed in the United States on March 11, 2023
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New Z Land Farms
Birmingham, US
★★★★★ 4
Insightful and Compassionate.
Format: Hardcover
I really love Nedra Glover Tawwab's work. I started with "Set Boundaries, Find Peace" and that opened the gateway to a broader and more helpful healing journey for me. This book, "Drama Fee" was just an evolutionary step in her series and a more in depth dealing with family relationships. The different perspectives for each chapter on how the concept can be applied was/is helpful as it often feels like books of this nature are only telling the black or white way to focus on a relationship. I felt seen and heard that though my familial relationships are unique there are commonalities and in turn ways to approach healing, reconciliation (with oneself and with family), understanding and compassion, to a achieve drama free relationships. As humans we are bread for connection and I appreciate Nedra Glover Tawwab's help in navigating them.
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Reviewed in the United States on June 9, 2025
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Diane Burroughs
Lexington, US
★★★★★ 5
Being Our True Selves In Relationships That Matter
Format: Kindle
Nedra Glover Tawwab is a New York Times bestselling author, a licensed therapist, and a sought-after relationship expert. This book is a therapeutic and educational tool that addresses how to consciously change behaviors you’d rather not have in relationships, specifically, around your family. For those of us who have delved into the self-help book world, this is an in-depth, thorough refresher, focusing on family dynamics. Nedra’s core belief is that relationships contribute to mental health. They can cause you pain or they heal you. She focuses on taking your relationships seriously and teaches the art of having tough but intentional conversations to create positive change. OR you’ll learn how to sever ties when the relationship is unmanageable. None is more influential than the formative years we’ve had with our family of origin. A lot of people lament that not everything is about the family, but yup, so often it’s true. In childhood, most likely we weren’t allowed to be ourselves, so our true selves started to develop when becoming an adult. Like a butterfly using its colossal strength to break out of its chrysalis, we too must use our emotional colossal strength to break out of our childhood mold in order to fly. We are able to have relationships with family on our terms.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 3, 2023

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