EcoFlow DELTA 2 Smart Extra Battery

The EcoFlow DELTA 2 Smart Extra Battery is your key to expanding the capacity of the DELTA 2 Portable Power Station, ensuring your home stays powered even in the most challenging emergencies. By adding this smart extra battery, you can increase the total capacity of your DELTA 2 to an impressive 2048Wh. This means you'll have ample energy reserves to keep your essential devices and appliances running smoothly, providing peace of mind in times of need.

Charging and managing your DELTA 2 and its Extra Battery is a breeze. They charge and discharge in perfect harmony, allowing you to recharge them from various sources such as portable solar panels, AC outlets, or the EcoFlow Smart Generator. This flexibility ensures that you can keep your power station ready to go, no matter where you are.

Moreover, the DELTA 2 is designed for efficiency, offering fast recharging capabilities. It can charge from 0-80% in just 80 minutes and achieve a full 0-100% charge in 130 minutes when using the AC input. Additionally, the DELTA 2 Smart Extra Battery comes with an internal storage compartment, providing convenient space for storing accessories. This thoughtful design not only enhances your organization but also helps save space at home or when you're on the go, making it a practical and versatile addition to your power setup.

Why buy from Wheels & Chairs?

  • Price - Wheels & Chairs offers the lowest price possible as allowed by our manufacturers. You won't be able to find any of our items for less than what we offer on the market.
  • Service - Our knowledgeable customer service team has the BEST response times in the industry. If you send a message to live chat and don't hear a response in 5 minutes or less, you get a discount.
  • Free Shipping in the US - We ship to anywhere in the US for absolutely free (contiguous states only). It's on us.
  • Return Policy - We match the return policies of our manufacturers for all products giving you the best possible deal (usually free returns within 30 days plus a restocking free. See the full return policy in "Shipping | Warranty | Returns" tab above.


We offer free shipping on all products.

Estimated Shipping Time: 7 Business Days


The EcoFlow service team will take care of all the after-sales issues. If any quality issues are involved, please feel free to contact our service team


Customers can request a full refund within 24 hours after placing an order on

Please note that we will charge a transaction fee if you apply for the refund 24 hours after the order is placed and before delivery has been made (2.6% for credit card users, 3.6% for PayPal users, 3.5% for Affirm users, 3.3% for Klarna users). 

Orders cannot be canceled more than 30 days after they are shipped.


The return service is currently available to US orders only. 

If you are unsatisfied with your purchase, you may return the purchased items complete in their original packing within 30 days of receiving them for an exchange or refund.

If 30 days have passed since your purchase, we cannot offer a refund or exchange.

For quality issues, we will give you a full refund or one-time free replacement within 30 days of receiving the items.

Please collect the package first if your order has been shipped and you want to return it. Then contact our Wheels & Chairs Support via to obtain instructions to return.

Please note that a double shipping fee may be deducted from the original payment if you reject the shipments.

You’ll be charged for shipping and a transaction fee (2.6% for credit card users, 3.6% for PayPal users, 3.5% for Affirm users) in the event of a return on US orders.

Return Process

Contact Wheels & Chairs at to start the return process. Please provide them with proof of purchase, such as an invoice.

You will receive instructions on how to properly pack the products and return them to us. Please make sure all components are included in the package. 


After you have returned the product to our warehouse, we will issue a refund within 14 business days. You will be notified by email when your order is refunded. If you have not received the refund after 14 business days, please contact us via

Return Shipping Cost

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

After-sale Service Contact

Phone: +1 (757) 654-1727 (English service only. International charges apply if calling from outside of the US)

Got questions? Read through our FAQ page listed in our Main Menu to see if it's answered there! If not, please contact us either through the chatbot found on the bottom right of the screen or via this form.

Customer Reviews

Based on 4 reviews
Abel Prasad

Quality product. ECO app is great accommodating. Ease of use is simple. Theres a comfort in knowing you still have some power when you lose power. I bought mine with an extra battery and a solar panel. Works great. Charges up with the wall outlet too not just solar. App provides many settings to choose whats best for you. I charged over night with wall outlet. Both units. App Set to 200w woke up in the morning and was good to go. Has an auto shutoff so i didn't need to worry.

Vhong Navarro
Double lastingg power

I bought this to expand my delta 2 power. Quick and easy to plug in and recognize by the main unit. It comes 30% charged and you have to calibrate it by discharging to 0% then charge to 100%. From that point they track well with each other. As it discharges it takes half the power from main unit and the other half from extra battery. Now I have a delta 2 that can supply 2000 wh, instead of 1000. Easy to move one at a time and we’ll designed to stack on top of one another.

Andrea Brillantes
So far so good

We have regular blackouts in Florida. Having a couple of small stations, I thought I would give this a whirl, at a nice sale price. I tested it and got almost 48 hours running a small fridge. I also used it a couple of nights to power my cpap. Without the heater turned on it appears I could get 4 nights at 8 hours no problem. As I use it in real life situations, I will update the rating and review. Oh, there was a follow-up call from an agent who was very knowledgeable. Also on sale, I ordered a second battery pack. I'm hoping this will power a full size fridge for at least 36 hours. I'm also buying a small pure sine wave generator which I hope will charge the Ecoflow. Plugged in, I get to 100% charged in less than 2 hours.

Aling Poping
Charged my mobility scooter

I bought these 2 units from 2 different sources but both worked as advertised. I used them on a 4 day camping trip. I recharged my mobility scooter from almost dead to fully charged twice and from fully dead to fully charged 1 time. I also kept everyone's cellphone and 1 cpap machine going before i had to charge everything back up. I've used it to run my refrigerator and chest freezer on my houseboat 3 weeks before this camping trip because the Marina had lost power for over 24 hours. Next is a solar panel or 2 for ghe roof of my houseboat