Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Missed This Deal? Get alerts when similar deals are posted.
expired
expired
iconian | Staff 26.8K Views
Jul 1, 2026 7:11 AM

Select Accts: ECO-WORTHY 3584Wh 12V 280Ah Smart LiFePO4 Battery w/ Bluetooth

$222

$399

44% off
+ Free S/Hat AliExpress
Visit AliExpress

Why are you downvoting this deal?

Good Deal?
76Comments
Save
Share
Deal Details
Update: This popular deal is available again.

ECOWORTHY-US Store via AliExpress has ECO-WORTHY 3584Wh 12V 280Ah Smart LiFePO4 Battery w/ Bluetooth on sale for $256.99 - $35 with promo code DEALUS35 at checkout = $221.99. Shipping is free.

Thanks to Deal Editor iconian for sharing this deal.

Note: Promo code is valid for select accounts only. Price may fluctuate slightly with currency exchange rates. You must be signed into your AliExpress account and have your address added to add items to your cart and place an order. You may have to manually type in the promo code to apply it at checkout. This item ships from a USA warehouse. For expedited customer service, please email [email protected].

Product Details:
  • Bluetooth and remote app monitoring to read the battery voltage, current, battery capacity and other important information
  • 200A BMS with multiple protections, including low-temperature protection (charging cut-off 19.4 F)
  • Supports up to 4 batteries in parallel, providing 1120Ah at 12V ideal for RVs, or 4 in series ideal for 48V solar power systems
  • High-strength metal frame, Grade A cells
  • 6000-15000 long life cycles & 10-Year life
  • 17.8 x 9.37 x 8.7" (61.7 lbs)
Expired promo code:
  • USDEAL35

Editor's Notes

Written by StrawMan86 | Staff
  • About this deal:
  • About this product:
    • Rated 4.9 out of 5 stars based on over 95 AliExpress customer reviews.
  • Additional notes:
    • Please see the original post for additional details & give the wiki and additional forum comments a read for helpful discussion.

Original Post

Written by iconian | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Update: This popular deal is available again.

ECOWORTHY-US Store via AliExpress has ECO-WORTHY 3584Wh 12V 280Ah Smart LiFePO4 Battery w/ Bluetooth on sale for $256.99 - $35 with promo code DEALUS35 at checkout = $221.99. Shipping is free.

Thanks to Deal Editor iconian for sharing this deal.

Note: Promo code is valid for select accounts only. Price may fluctuate slightly with currency exchange rates. You must be signed into your AliExpress account and have your address added to add items to your cart and place an order. You may have to manually type in the promo code to apply it at checkout. This item ships from a USA warehouse. For expedited customer service, please email [email protected].

Product Details:
  • Bluetooth and remote app monitoring to read the battery voltage, current, battery capacity and other important information
  • 200A BMS with multiple protections, including low-temperature protection (charging cut-off 19.4 F)
  • Supports up to 4 batteries in parallel, providing 1120Ah at 12V ideal for RVs, or 4 in series ideal for 48V solar power systems
  • High-strength metal frame, Grade A cells
  • 6000-15000 long life cycles & 10-Year life
  • 17.8 x 9.37 x 8.7" (61.7 lbs)
Expired promo code:
  • USDEAL35

Editor's Notes

Written by StrawMan86 | Staff
  • About this deal:
  • About this product:
    • Rated 4.9 out of 5 stars based on over 95 AliExpress customer reviews.
  • Additional notes:
    • Please see the original post for additional details & give the wiki and additional forum comments a read for helpful discussion.

Original Post

Written by iconian | Staff

Community Voting

Deal Score
+142
Good Deal
Bad Deal

Why are you downvoting this deal?

Visit AliExpress

Top Comments

ghostwriter66
4.1KComments
445Reputation
If you do buy one -- and at $222 thats a phenominal price .... but do the following ...

We have these batteries here at work ...

When you get yours:

Make sure Bluetooth app connects.

Make sure resting voltage is roughly 13.1–13.4V charged.

AND the easiest way to see if its real or fake -- The official Eco-Worthy specs for this battery says about 61.7 lb ... if it shows up at 35–40 lb, something is wrong.
Go to Comment
ghostwriter66
4.1KComments
445Reputation
So in 2008 a 12v 100Ah LiFePO4 battery ran right at $1000 ....

A 280Ah was right at $2450 ,,,,

And that was with a very crappy BMS - if at all ...

so yes ... a 280Ah with excellent BMS for $222 is a pretty damn good deal ...
Go to Comment

Community Reviews

This ECO-WORTHY 12V 280Ah LiFePO4 battery stands out as a very low-cost way to get a large smart battery with Bluetooth monitoring. The app can show charge state and estimated runtime, and real-world use includes camper, boat, fridge, and backup power setups. Pricing context makes the $222 tag look unusually strong versus typical $350 plus pricing. Main cautions are the heavy weight, lithium charging requirements, and reports that checkout pricing, codes, and availability can change quickly.

  • The battery app can display charge state and estimate remaining runtime based on usage.

    BoarderPH

  • The battery can support 12V loads like a fridge and can extend runtime with solar and MPPT setups.

    wills916

  • The battery can be used to charge an EcoFlow Delta through its solar port.

    SiennaSoda2668

  • The battery can be charged to about 14.2-14.6V to help balance cells and maximize battery life.

    jasonw2714

  • The price can jump from the cart amount to a much higher total during address entry.

    Smiert

  • Checkout can fail with a security error message that prevents processing the request.

    DocuMaker

  • Warranty information may be hard to find, and the terms or policies link can redirect to an Alibaba page.

    bradymartin

  • The battery is not suitable for engine starting and it has different charging requirements than lead-acid batteries.

    Mark34204

Common Questions (5)

AI-generated summary based on comments from the community. Updated ago

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

77 Comments

Sign up for a Slickdeals account to remove this ad.

Jul 1, 2026 12:47 PM
550 Comments
Joined Nov 2004
mblitchJul 1, 2026 12:47 PM
550 Comments
The FJUS $35 coupon doesn't come into effect until 3pm EST ON July 1.
1
Jul 1, 2026 1:57 PM
22 Comments
Joined Oct 2019
DilaxJul 1, 2026 1:57 PM
22 Comments
Good deal, I grabbed one.
Jul 1, 2026 5:06 PM
39 Comments
Joined Jan 2017
afloyd2000Jul 1, 2026 5:06 PM
39 Comments
I wish I had waited on 12v batteries. This a not much more than I paid for 12v 100ah a couple years ago.
Jul 1, 2026 5:28 PM
406 Comments
Joined Mar 2018
bradymartinJul 1, 2026 5:28 PM
406 Comments
any other good site that sells these batteries at these prices?
3
Jul 1, 2026 5:45 PM
22 Comments
Joined Mar 2014
Stats_GuyJul 1, 2026 5:45 PM
22 Comments
Already bought 2 of these at similar price, great deal for the features!
Jul 1, 2026 5:47 PM
22 Comments
Joined Mar 2014
Stats_GuyJul 1, 2026 5:47 PM
22 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from bradymartin View quoted comment :
any other good site that sells these batteries at these prices?
None that I have been able to find, Amazon marks them up quite a bit. I bought 2 of these over the last few month from AliExpress (Same EcoWorthy-US Store) and have had no issues!
2
Jul 1, 2026 5:48 PM
1K Comments
Joined Jun 2009
greenshellJul 1, 2026 5:48 PM
1K Comments
I'm buying a 6th one

Sign up for a Slickdeals account to remove this ad.

Jul 1, 2026 5:52 PM
4.1K Comments
Joined Mar 2004
ghostwriter66Jul 1, 2026 5:52 PM
4.1K Comments
Quote from afloyd2000 View quoted comment :
I wish I had waited on 12v batteries. This a not much more than I paid for 12v 100ah a couple years ago.
So in 2008 a 12v 100Ah LiFePO4 battery ran right at $1000 ....

A 280Ah was right at $2450 ,,,,

And that was with a very crappy BMS - if at all ...

so yes ... a 280Ah with excellent BMS for $222 is a pretty damn good deal ...
Jul 1, 2026 6:13 PM
78 Comments
Joined Feb 2014
Adamm345Jul 1, 2026 6:13 PM
78 Comments
I'm looking at two of these for a 24V trolling motor, anyone have experience with them in this capacity?
Jul 1, 2026 6:15 PM
4.1K Comments
Joined Mar 2004
ghostwriter66Jul 1, 2026 6:15 PM
4.1K Comments

Our community has rated this post as helpful. If you agree, why not thank

If you do buy one -- and at $222 thats a phenominal price .... but do the following ...

We have these batteries here at work ...

When you get yours:

Make sure Bluetooth app connects.

Make sure resting voltage is roughly 13.1–13.4V charged.

AND the easiest way to see if its real or fake -- The official Eco-Worthy specs for this battery says about 61.7 lb ... if it shows up at 35–40 lb, something is wrong.
9
1
Jul 1, 2026 6:21 PM
4.1K Comments
Joined Mar 2004
ghostwriter66Jul 1, 2026 6:21 PM
4.1K Comments
Quote from bradymartin View quoted comment :
any other good site that sells these batteries at these prices?
NO .... i was very suspect that this was a fake site from AliExpress BUT it does say shipped from the US ... make sure you pay via credit card so you can contest it if its a fake ... but at $222 I would consider this an extremely good deal ... you could not even do a DIY at this price ... most of the time these run about $350+ ....
1
Jul 1, 2026 6:28 PM
138 Comments
Joined Feb 2008
BoarderPHJul 1, 2026 6:28 PM
138 Comments
Quote from ghostwriter66 View quoted comment :
If you do buy one -- and at $222 thats a phenominal price .... but do the following ...

We have these batteries here at work ...

When you get yours:

Make sure Bluetooth app connects.

Make sure resting voltage is roughly 13.1–13.4V charged.

AND the easiest way to see if its real or fake -- The official Eco-Worthy specs for this battery says about 61.7 lb ... if it shows up at 35–40 lb, something is wrong.
Interesting. Mine says 13.53 volts at full charge. Bought off aliexpress last fall and just installed in our camper. Had to swap out my converter/charger to charge it correctly but looks like the cells are all balanced now. Like that the app shows me charge state and estimates how long it will last based on my usage.
Jul 1, 2026 6:30 PM
2 Comments
Joined Nov 2017
jacob.b.jarvisJul 1, 2026 6:30 PM
2 Comments
Quote from ghostwriter66 View quoted comment :

NO .... i was very suspect that this was a fake site from AliExpress BUT it does say shipped from the US ... make sure you pay via credit card so you can contest it if its a fake ... but at $222 I would consider this an extremely good deal ... you could not even do a DIY at this price ... most of the time these run about $350+ ....
Bah, it says the code doesn't work for security reasons and it won't let me checkout even without the code wth.
Jul 1, 2026 6:38 PM
264 Comments
Joined Oct 2018
MemorableFog987Jul 1, 2026 6:38 PM
264 Comments
Quote from bradymartin View quoted comment :
any other good site that sells these batteries at these prices?
I've ordered this from AliExpress and it is actually EcoWorthy themselves selling it on there and shipping them out.

Sign up for a Slickdeals account to remove this ad.

Jul 1, 2026 6:40 PM
12 Comments
Joined Apr 2023
Hult250RJul 1, 2026 6:40 PM
12 Comments
Quote from Adamm345 View quoted comment :
I'm looking at two of these for a 24V trolling motor, anyone have experience with them in this capacity?
I have eco worthy 50ah batteries on my boat and can fish for 3-4 days without charging, lots of spot-lock and moving as well. these would last me all season without a charge.
1

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

Related Searches

Free ShippingOccasions4th of JulyTech & ElectronicsTech AccessoriesBatteriesECO-WORTHY