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Save $100 on $2000+ Orders with code SAVE100L&C - Christmas Sale Ending in 48hrs | Hundreds of Top-Rated Reviews | Speak With An Expert 854-777-0909 (Mon-Fri 9a-5p CST)
Save $100 on $2000+ Orders with code SAVE100L&C - Christmas Sale Ending in 48hrs | Hundreds of Top-Rated Reviews | Speak With An Expert 854-777-0909 (Mon-Fri 9a-5p CST)

EcoFlow Delta Series Battery

Save $800.00 Save $800.00
Original price $2,799.00
Original price $998.00 - Original price $3,299.00
Original price $2,799.00
Current price $1,999.00
$699.00 - $2,499.00
Current price $1,999.00

EcoFlow Delta Series Battery

Key Features

  • Increase the Capacity of Your EcoFlow Delta Portable Power Station
  • LFP Battery with 10-year Lifespan
  • Power Up at Lower Cost

Double or triple the capacity of your EcoFlow Delta for up to 30% less compared to buying another power station when you add an EcoFlow Delta battery. 

A Delta Smart Extra Battery enhances the power of the EcoFlow station you already own. It gives you the freedom to charge your portable power station and increase its output at the same time. Just link the extra battery and watch as they sync their charging and discharging to maintain the battery levels across both units.

EcoFlow Delta Pro triples its power with two extra batteries

Made with advanced LFP battery chemistry, the Delta Pro, Delta 2 Max, and Delta 2 Smart Extra Battery boast a lifespan of 3000 full cycles before diminishing to 80% capacity. This gives you almost a decade of reliable power, even with daily use—SIX TIMES LONGER than similar-capacity power stations. 

The Smart Extra Battery has a clear LCD screen on the unit's front that shows all the essential details—output, input, remaining charge, and estimated time left. So you can stay informed and in control.

Need info on the go? The EcoFlow app shows you everything you need to know. Making charging and monitoring the Delta Extra Battery a breeze.

The Delta Smart Extra Batteries have a user-friendly and compact design so you can stack them on top of each other and save space. They are easy to set up and use—just plug it into your power station for more energy storage and power.

Looking for a custom bundle? Call to set up a deal that's built for you.
854-777-0909 (M-F 9a-5p CST) or email us at sales@lakehouseandcottage.com

Product Specifications

Specifications

Delta Pro Ultra
Battery
Delta Pro
Battery
Delta 2 Max
Battery

Delta Max
Battery

Delta 2
Battery
Capacity 6000Wh 3600Wh 2048Wh 2016Wh 2016Wh
Battery Chemistry LFP LFP LFP chemistry NCM NCM
Cycle Life 3,500 cycles to 80% capacity 6,500 cycles to 50% capacity, 3,500 cycles to 80% capacity 3000 cycles to >80% capacity 800 cycles to 80% capacity 800 cycles to 80% capacity
Dimension 26 × 18 × 8 in 25 x 11.2 x 16.4 in 18 × 9 × 11 in 18.3 × 9.3 × 11.1 in 18.3 × 9.3 × 11.1 in
Weight 116.4 lbs 84 lbs 42 lbs 40 lbs 40 lbs
Compatibility Delta Pro Ultra DELTA Pro DELTA 2 / DELTA Max 2000/ DELTA 2 Max DELTA 2, DELTA Max, DELTA 2 Max DELTA 2, DELTA Max, DELTA 2 Max

DELTA Pro Smart Extra Battery

  • Boost Delta Pro's Capacity: Level up Delta Pro’s capacity by an additional 3600Wh.
  • Triple Power, Lower Cost: Get triple the power at less cost. The expandable capacity ranges from 3kWh to 10kWh. Add up to two Delta Pro Extra Batteries for a total capacity of 10.8kWh. This option is up to 30% more cost-effective than adding another power station of the same capacity.
  • 10-Year Lifespan with LFP Battery: Benefit from a 10-year lifespan even with daily use, thanks to the LFP battery technology. 
  • In the Box: Delta Pro Smart Extra Battery, Delta Pro Extra Battery Cable, Handle Cover, User Manual

DELTA 2 Max Smart Extra Battery

  • Extendable Capacity: Boost the capacity of Delta 2, Delta Max, and Delta 2 Max with an additional 2048Wh.
  • Triple Power, Lower Cost: Enjoy triple the power at less cost. The expandable capacity ranges from 2kWh to 6kWh with the addition of up to two Delta 2 Max Smart Extra Batteries. Giving you a total capacity of 6144Wh. This option is up to 30% more cost-effective compared to adding another power station of similar capacity.
  • 10-Year Lifespan with LFP Battery: Benefit from a 10-year lifespan even with daily usage, thanks to the LFP battery technology.
  • In the Box: Delta 2 Max Smart Extra Battery, Delta 2 Max Extra Battery Cable, User Manual, Warranty Card

DELTA Max Smart Extra Battery

  • Enhanced Capacity: Elevate the capacity of Delta 2, Delta Max, and Delta 2 Max by an additional 2016Wh.
  • Triple the Power, Reduced Cost: Triple the power at less cost. Expand the capacity from 2kWh to 6kWh by adding up to two Delta Max Smart Extra Batteries. Giving you a total capacity of 6048Wh. This option is up to 30% more affordable compared to power stations of the same capacity.
  • User-Friendly: Enjoy plug-and-play convenience without any setup requirements. The EcoFlow app provides easy monitoring and control.
  • In the Box: Delta Max Smart Extra Battery, Delta Max Extra Battery Cable, User Manual

DELTA 2 Smart Extra Battery

  • Enhanced Capacity: Boost the capacity of DELTA 2 by an additional 1024Wh.
  • Doubled Power, Lower Cost: Double the power with 2kWh of expandable capacity while maintaining up to 30% lower costs compared to power stations of equivalent capacity.
  • Extended Lifespan: Benefit from a 10-year lifespan with an LFP battery, providing reliable daily use until it reaches 80% of its original capacity, equating to over 3000 charging cycles.
  • In the Box: Delta 2 Smart Extra Battery, Delta 2 Extra Battery Cable, User Manual, Warranty Card 

FAQ

What makes the Smart Extra Battery "smart"?
The Delta Series Smart Extra Battery can be monitored and controlled remotely via the EcoFlow app, offering convenience and control from a distance.

How fast does the Smart Extra Battery charge?
Charge speed varies based on the chosen method, but it's notably fast. Utilizing MultiCharge achieves a rapid 6500W charge speed, allowing both the Delta Pro and the extra battery to charge in under 2 hours. When using a standard AC wall outlet, expect a full charge in approximately 2.7 hours, assuming the Delta Pro unit is fully charged.

How many extra batteries can I use with a portable power station?
The Delta 2 supports only one extra battery, while the Delta Pro, Delta Max, and Delta 2 Max can support up to two extra batteries.

Can I charge the extra battery without connecting it to a power station?
Yes. Using a Smart Generator allows you to charge an extra battery even when it's not connected to a power station. All other charging methods require it to be connected to a power station.

Warranty

Note that warranty periods might differ due to local laws and regulations. In some places, limitations on implied warranty duration may not apply to you. Your rights can vary based on your state, province, or country.

Please read the warranty terms before using your products. All EcoFlow items purchased on lakehouseandcottage.com have a limited warranty through EcoFlow, detailed below. By using EcoFlow products, you agree to adhere to the terms of the EcoFlow limited warranty.

The limited warranty for purchases on lakehouseandcottage.com initiates when the original purchaser receives the products.

Item Warranty Period

Delta Pro Smart Extra Battery

Delta Max Smart Extra Battery

Delta 2 Max Smart Extra Battery

24 months
Delta 2 Smart Extra Battery 5 years

 

This warranty does not cover:

  • Issues not related to quality.
  • Items bought from places other than lakehouseandcottage.com.
  • Purchases lacking valid proof of purchase.
  • Items that have been refunded.
  • Items past their warranty period.
  • Defects or damages due to misuse, unauthorized modification, disassembly, or improper operation as per official instructions or manuals.
  • Defects or damages due to exposure to extreme heat, liquids, or other external factors.
  • Defects or damages due to compatibility issues from using unauthorized third-party parts.
  • Lost or stolen products.
  • Free products.

Valid Proof of Purchase

  • A purchase order number made through lakehouseandcottage.com;
  • Order confirmation email or invoice that clearly states the description of the product, its price, and where it was purchased.

    Warranty Return Authorization Process

    • Contact Lakehouse & Cottage Customer Service Team at sales@lakehouseandcottage.com or 854-777-0909.
    • If your item is eligible for an EcoFlow Warranty, you will receive a prepaid shipping label. Please follow the instructions provided by Lakehouse & Cottage Support to pack the products and safely return them.
    • Please note that we can only provide return shipping labels for return packages in United States.

    Replacements

    Should a replacement be necessary, the delivery of the replacement item will be coordinated within 15 business days (subject to adjustments due to unforeseen circumstances) after confirming receipt of the defective item at our warehouse. The ultimate resolution depends on the availability of replacement items.

    The replacement warranty will extend for a period equivalent to the remaining warranty duration of the original item.

    Shipping

    Processing Times

    All orders are typically processed within 1-2 business days.

    Product ETA is 5-7 business days.

    Please note, we do not process shipments on weekends or public holidays. During high order volumes, there may be a slight delay; please allow extra transit time. If a significant shipping delay occurs, we'll notify you via email you provided.

    Shipping Carriers

    Lakehouse & Cottage uses USPS, FedEx, and UPS delivery services.

    We offer FREE Shipping on all our products. 

    Available Shipping Areas

    Orders are shipped within the contiguous United States, excluding outlying islands and overseas territories.

    Shipping Information Responsibility

    Ensure accurate shipping details when placing an order. We're not liable for losses due to incorrect shipping information.

    P.O. Box or APO/FPO/DPO addresses are not accepted.

    Shipping Tracking Information

    You will receive shipment confirmation and tracking information via email. 

    You will receive confirmation once your order has been received and is being prepared to ship.

    After your order has been packaged, tracking will be added and sent to you. You will receive tracking information to the email address you provided.

    Check the Status of Your Order

    Your confirmation email will have a link to check the status of your order. 

    You will also receive notifications when your order ships with tracking information provided through the shipping carrier.

    For additional help checking the status of your order or if you have not received your confirmation email within 48hrs, please contact us at sales@lakehouseandcottage.com

    Damaged or Missing Items

    Report any damage or missing packages within 7 business days to sales@lakehouseandcottage.com. While we don't assume responsibility for shipping carrier errors, we'll assist in contacting them and making things right. Keep packaging and damaged items for potential claims.

    Refunds and Returns

    We know you'll love your order! But just in case you're not fully satisfied, we've streamlined an easy return process.

    Cancellation

    You can request a full refund within 24 hours of placing your order on lakehouseandcottage.com. However, a transaction fee will apply if you request a refund after 24 hours but before delivery (2.6% for credit card users, 3.6% for PayPal users, 3.5% for Affirm users, 3.3% for Klarna users). Orders can't be canceled more than 30 days after shipment.

    Returns

    Our return service currently applies to US orders only. If you're unsatisfied, you can return items in their original packaging within 30 days for an exchange or refund. However, after 30 days, refunds or exchanges aren't possible.

    For quality issues, we offer a full refund or one-time free replacement within 30 days of receiving the items. Contact our support team via sales@lakehouseandcottage.com for return instructions after collecting the shipped package. Please note, refusing shipments may incur a double shipping fee deduction.

    Return Process

    Initiate returns by contacting Lakehouse & Cottage Support at sales@lakehouseandcottage.com with proof of purchase. We'll provide instructions for packaging and returning the products. Ensure all components are included.

    Refund

    After returning the product to our warehouse, expect a refund within 14 business days. You'll receive an email notification upon refund processing. If the refund isn't received after 14 business days, contact us at sales@lakehouseandcottage.com.

    Return Shipping Cost

    For returns on US orders, a shipping fee and a transaction fee (2.6% for credit card users, 3.6% for PayPal users, 3.5% for Affirm users) apply.

    Product Shipping Cost
    DELTA Max Smart Extra Battery $70
    DELTA Pro Smart Extra Battery $70
    DELTA 2 Max Smart Extra Battery $60
    DELTA 2 Max Max Smart Extra Battery $75

     

    Please note that return shipping costs include shipping costs and handling fees.

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    Speak with an Expert

    Questions? Give us a call today.
    854-777-0909
    (M-F 9a-5p CST)

    Customer Reviews

    Based on 4 reviews
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    J
    Jordan M.

    It's a tad early for a full review since we just unpacked the unit yesterday. The packaging was top-notch—nestled in 3-inch-plus foam cushions, which we plan to keep in case of future shipments for repairs. The unit arrived in pristine condition, and it's a sleek and compact beauty.

    Our plan is to use this during day trips in our truck, paired with an RV-style large canopy, to power 12-volt items and small electronics. When not on trips, we'll store it indoors to avoid subjecting it to extreme temperatures in the truck. Additionally, we'll keep it handy at home for occasional annoying power outages. We've got a large gas/propane generator, but it's too bulky for quick outages. This unit's size makes it much more convenient to move around as needed.

    I'll try to provide an update after using it for a while. We chose this unit for its simplicity and the advantages of no noxious fumes or noise, unlike classic gas generators.

    E
    Emi
    great customer service

    I've owned it for about 6 months now, taken it camping, relied on it during power outages, and it's been stellar! The recharge times are impressively short compared to others in the same market, and it handles both AC and DC charges, including solar, all at once. The IOS app for monitoring and controlling the device is fantastic—you can easily track power usage while on the same Wi-Fi network without needing to check the device's screen. Plus, you can adjust charging inputs and boost settings directly from the app. Once, I faced an issue with it, reached out to customer service, and within less than 3 weeks, I had it RMA'd and replaced hassle-free. Their customer service was a major reason why I chose to buy from them—they truly stand by their products!

    S
    Sypher

    Excellent

    A
    Alex Meyers

    I recently bought this battery to expand my EcoFlow Delta Max's power capacity, aiming to double the backup power during outages. My Delta Max, purchased a year ago, has been an absolute delight. After researching various brands, watching countless video reviews, and scrutinizing specs, it was clear that EcoFlow was the top-notch choice in the market. The setup is straightforward, it's easily portable, and it packs a punch in such a compact box. Though I haven't used it in an emergency, thorough testing has left me thoroughly impressed.

    I'm planning to save up for a second battery soon to max out the power storage for the inevitable major power outage. With this product and 800 watts of solar panels, I have peace of mind knowing I'll always have necessary power if the grid goes down. My Delta Max stays charged and doesn't need fuel, ready for action whenever I need it. I'd recommend this product even if you already own a gas-powered generator.