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- USA
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Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
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Description
EcoFlow DELTA Pro 3600Wh Smart Extra BatteryBoost your EcoFlow DELTA Pro energy system with this advanced 3600Wh Smart Extra Battery. Designed for seamless integration, it expands your overall power storage for home backup, outdoor use, and off grid applications. Enjoy reliable long term performance with premium LFP battery technology that maintains up to 80% capacity even after years of daily charging cycles. With intuitive monitoring through the EcoFlow app and simple plug and play setup,
Boost your EcoFlow DELTA Pro energy system with this advanced 3600Wh Smart Extra Battery. Designed for seamless integration, it expands your overall power storage for home backup, outdoor use, and off-grid applications. Enjoy reliable long-term performance with premium LFP battery technology that maintains up to 80% capacity even after years of daily charging cycles. With intuitive monitoring through the EcoFlow app and simple plug-and-play setup, enhancing your power system has never been easier.
Make it a triple.
Double or triple the capacity of your DELTA Pro to 7.2kWh or 10.8kWh. That'll give you days of power for your essential appliances.
Charge anytime, anywhere.
DELTA Pro's Smart Extra Battery benefits from all the charging methods DELTA Pro has, including 6500W MultiCharge. That means you can charge anytime, anywhere as long as your extra battery is connected to DELTA Pro. Once connected, they'll charge/discharge in unison, keeping the battery percent level across both units.
Ready for any emergency.
When the going gets tough and you're out of charge options, get a 1800W DC fast charge with EcoFlow Smart Generator (sold separately). Just plug the generator directly into your extra battery via the port on the back. This works even when disconnected from your DELTA Pro.
Stay informed.
- The Smart Extra Battery sports a bright LCD screen on the front of the unit giving you all the info you need.
- Output, input, remaining charge and time remaining. It's all there. Need on the go info?
- The EcoFlow app can tell you all that & a whole lot more.
Features
- Expandable power storage - Add an extra 3600Wh to your DELTA Pro for more runtime and greater independence.
- Cost-efficient high-capacity solution - Scale your system from 3kWh to 10.8kWh by connecting up to two extra batteries, saving up to 30% compared to alternative large power stations.
- Long-lasting durability - Built with LFP battery cells for an impressive 10-year lifespan and over 3,000 charging cycles while maintaining 80%+ performance.
- Effortless operation - Simple direct connection with no configuration required, plus remote monitoring and control through the EcoFlow smart app.
Specifications
- Net Weight: 84 lbs
- Dimensions: 25 in x— 11.2 in x— 16.4 in
- Battery Capacity: 3,600Wh, 48V
- Input
-
Extra Battery Port Input: 48V, 3,200W Max
Output
-
Extra Battery Port Output: 45V-54V, 4,260W Max
Battery System
- Cell Type: LFP (Lithium Iron Phosphate)
- Cycle Life: 3,500+ cycles to 80% remaining capacity
- Safety Features:
- Overload protection
- Over-temperature protection
- Short-circuit protection
- Low-temperature protection
- Low-voltage protection
- Overcurrent protection
Environmental Conditions
- Optimal Operating Range: 68°F to 86°F
- Discharge Temperature: 14°F to 113°F
- Charging Temperature: 32°F to 113°F
- Storage Temperature: 14°F to 113°F (Best: 68°F to 86°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:
- 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
4.5 ★★★★★
Based on 1010 reviews
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Product Reviews
★★★★★ 5
Shockingly great affordable basic T- Shirts
Fit Type: Regular Fit, Color: Black/Black, Size: 6X-Large Big Tall
I love these shirts! The fact they are big and tall is amazing. Better than Hanes, Fruit of the Loom, and Gildan. I am 6 foot 5 and heavier than I'd like to admit. I also have a wide chest 64 inches(Its hereditary). I need width and length! It is tough to find a shirt that is big and tall. Literally it's one or the other. Amazon of all places solved this. I did get two that weren't right they replaced them swiftly. Also for some strange reason white is a tad bit smaller in the same size. Usually it's the other way around with other manufacturers. I could not find black shirts that fit me comfortably for years! I was convinced it would be impossible to ever find any that would fit. This felt like a long shot and it paid off! Which is rare. I do not dry them in the dryer I know they will shrink(Probably wouldn't hurt to wash cold). If you want to dry them and you can I would go size up. Not too thin or too heavy wouldn't consider it an undershirt.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 28, 2026
★★★★★ 5
New default shirt
Fit Type: Regular Fit, Color: Navy/Navy, Size: Small
Amazon has again proved that it did good research about what makes a good basic garment. I've been wearing these for a few weeks now and honestly I forgot about them because they just fit and are not annoying and don't look bad. They are good. Also the cotton seems high quality and is soft. Also the small fit as expected.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
★★★★★ 3
Good quality cloth, but shrinks
Fit Type: Regular Fit, Color: Black/Black, Size: X-Large
Nice fabric. But it shrinks after the first wash
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
★★★★★ 5
Durable, Comfortable, and a Great Everyday Basic
Size: XX-Large, Color: Navy, Pocket Description: Plain Front
The Amazon Essentials Men’s Relaxed-Fit Heavyweight Cotton T-Shirt is exactly what a good basic tee should be—comfortable, well-made, and built to last. The heavyweight cotton feels substantial without being stiff, and it holds its shape nicely after multiple washes.
The relaxed fit gives plenty of room for movement without looking sloppy, and the fabric has just the right amount of structure for a polished casual look. It works equally well for layering under flannels or wearing on its own.
Pros:
• Thick, high-quality cotton that feels durable
• Relaxed fit for comfort and ease of movement
• Retains shape and color after washing
• Versatile for casual wear or layering
Cons:
• Slightly longer length may not suit shorter torsos
• Limited stretch since it’s 100% cotton
Bottom line: A sturdy, well-fitting T-shirt that’s perfect for everyday wear. Great quality for the price and likely to become a wardrobe staple.
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Reviewed in the United States on August 12, 2025
★★★★★ 5
Great Color and Great Fit !
Size: X-Large, Color: Bright Poppy Red, Pocket Description: Plain Front
I purchased sever bright shirts on Amazon for bike riding near busy streets. This shirt is perfect. It fits and feels good. After washing the color held strong. Very happy with this purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 12, 2026
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