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Red_Liz | Staff 11.2K Views
Jun 10, 2026 4:32 PM

2-Pk ECO-WORTHY 102Wh 12V 8AH LiFePO4 Lithium Battery for UPS

$40

$50

20% off
+ Free S&Hat eBay
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eco-worthy-us via eBay has 2-Pack ECO-WORTHY 102Wh 12V 8AH LiFePO4 Lithium Battery for UPS on sale for $49.99 - $10 (20%) off when you apply coupon code FAVEDEAL20 on the checkout page = $39.99. Shipping is free.

Thanks to Staff Member Red_Liz for sharing this deal.

About this product:
  • 12V 8Ah LiFePO4 lithium batteries w/ 102Wh capacity
  • Built-in BMS protects against overcharge and short circuit
  • Maintains 80% capacity after 3000 deep cycles
  • Supports fast charging, solar charging, and capacity expansion
  • Suitable for UPS, RV, marine, off-grid, and backup power systems

Editor's Notes

Written by qwikwit | Staff
  • About this Store:
    • eco-worthy-us via eBay has a 99.1% positive feedback with over 141K items sold.
    • 30 days returns. Seller pays for return shipping.
  • Additional Information:
    • Coupon offer valid through June 14, 2026 at 11:59PM PT, while supplies last.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by Red_Liz | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
eco-worthy-us via eBay has 2-Pack ECO-WORTHY 102Wh 12V 8AH LiFePO4 Lithium Battery for UPS on sale for $49.99 - $10 (20%) off when you apply coupon code FAVEDEAL20 on the checkout page = $39.99. Shipping is free.

Thanks to Staff Member Red_Liz for sharing this deal.

About this product:
  • 12V 8Ah LiFePO4 lithium batteries w/ 102Wh capacity
  • Built-in BMS protects against overcharge and short circuit
  • Maintains 80% capacity after 3000 deep cycles
  • Supports fast charging, solar charging, and capacity expansion
  • Suitable for UPS, RV, marine, off-grid, and backup power systems

Editor's Notes

Written by qwikwit | Staff
  • About this Store:
    • eco-worthy-us via eBay has a 99.1% positive feedback with over 141K items sold.
    • 30 days returns. Seller pays for return shipping.
  • Additional Information:
    • Coupon offer valid through June 14, 2026 at 11:59PM PT, while supplies last.
    • Please see the original post for additional details and/or view the Wiki and forum comments for further helpful discussion if available.

Original Post

Written by Red_Liz | Staff

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Top Comments

SDHank
28Comments
14Reputation
It's very difficult to find the full specs on these but if you take the time you'll find that these are only rated at 10 amp discharge. That means that for a typical UPS using both batteries you're only getting 240 watts maximum output.
Here's one of the few listings I saw where discharge current was listed at all.
https://www.amazon.co.uk/ECO-WORT...B08ZSBS1ZY
Go to Comment
natecmd
262Comments
73Reputation
LiFePo4 batteries are one of the safer lithium chemistries. Search for Will Prowse on YouTube and there's a recent video where he used a spark generator to try and ignite a damaged battery that was venting flammable gasses in an enclosure that kept the gases contained. It seemed to take a lot of work, and a reasonably built battery operated under normal conditions (charging/discharge rates) and stored in a cool/dry place seems to have a favorable risk profile for most.
Go to Comment

Community Reviews

These ECO-WORTHY 12V 8Ah LiFePO4 batteries look best for small, low power backup or solar setups, especially sheds, lights, or a compact UPS. The chemistry is viewed as safer than other lithium types, and the built in cutoff helps them tolerate deep discharge better than lead acid. The main limitation is output and capacity, with published specs pointing to only 10 amp discharge and very short runtime for high load gear. Compatibility is another concern because many UPS units may not charge LiFePO4 correctly or handle the different battery behavior.

  • LiFePO4 chemistry can offer a favorable safety risk profile under normal charging and discharge conditions.

    natecmd

  • These batteries can work well for shed or off-grid small setups that need runtime for lights and similar loads.

    PurpleSink3298

  • A 2-pack configuration can provide enough energy for an outdoor solar security camera to run through several low-light days.

    81Winfield

  • These 12V packs can be combined in series to create a 48V battery pack for an ebike range extension.

    golfreak

  • The batteries can be limited to about 10A discharge, which can cap UPS output around roughly 240 watts when using both batteries.

    SDHank

  • Many UPS units may not charge LiFePO4 properly because they lack adjustable charging voltage for switching from SLA.

    avalon

  • A CyberPower 1500VA UPS battery swap may not be worth the risk because the UPS may not handle the different battery chemistry.

    jrodil

  • The 8Ah capacity can be too low for high-load devices, so UPS runtime may be only a few minutes for low-wattage rigs.

    prankies

Common Questions (5)

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

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42 Comments

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Jun 10, 2026 6:50 PM
28 Comments
Joined Nov 2017
SDHankJun 10, 2026 6:50 PM
28 Comments

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

It's very difficult to find the full specs on these but if you take the time you'll find that these are only rated at 10 amp discharge. That means that for a typical UPS using both batteries you're only getting 240 watts maximum output.
Here's one of the few listings I saw where discharge current was listed at all.
https://www.amazon.co.uk/ECO-WORT...B08ZSBS1ZY
8
Jun 10, 2026 10:46 PM
5 Comments
Joined Nov 2017
YrrdeadJun 10, 2026 10:46 PM
5 Comments
Quote from SDHank View quoted comment :
It's very difficult to find the full specs on these but if you take the time you'll find that these are only rated at 10 amp discharge. That means that for a typical UPS using both batteries you're only getting 240 watts maximum output.Here's one of the few listings I saw where discharge current was listed at all. https://www.amazon.co.uk/ECO-WORT...B08ZSBS1ZY
Thinking about this for solar+led night lights for a kids play structure? Overkill or about right?
Jun 10, 2026 10:51 PM
17 Comments
Joined Oct 2010
dirty504Jun 10, 2026 10:51 PM
17 Comments
Quote from Yrrdead View quoted comment :
Thinking about this for solar+led night lights for a kids play structure? Overkill or about right?
If I had to put solar+led night lights on a kids play structure, I'd get one of those battery packs with a solar panel built in and run the LED's directly off that.
Jun 10, 2026 10:51 PM
775 Comments
Joined Nov 2007
far3320Jun 10, 2026 10:51 PM
775 Comments
If putting these in my house, I wonder if I should get a lithium fire extinguisher. Supposedly lithium batteries cannot be extinguihsed by regular fire extinguishers.
3
Jun 10, 2026 10:56 PM
28 Comments
Joined Nov 2017

This comment has been rated as unhelpful by Slickdeals users.

Jun 10, 2026 11:03 PM
968 Comments
Joined Dec 2016
DataMeisterJun 10, 2026 11:03 PM
968 Comments
What UPS do these actually go in? Most of them come with Lead Acid, which I assume uses different charging methods.
Jun 10, 2026 11:05 PM
262 Comments
Joined Oct 2012
natecmdJun 10, 2026 11:05 PM
262 Comments

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

Quote from far3320 View quoted comment :
If putting these in my house, I wonder if I should get a lithium fire extinguisher. Supposedly lithium batteries cannot be extinguihsed by regular fire extinguishers.
LiFePo4 batteries are one of the safer lithium chemistries. Search for Will Prowse on YouTube and there's a recent video where he used a spark generator to try and ignite a damaged battery that was venting flammable gasses in an enclosure that kept the gases contained. It seemed to take a lot of work, and a reasonably built battery operated under normal conditions (charging/discharge rates) and stored in a cool/dry place seems to have a favorable risk profile for most.
2

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Jun 10, 2026 11:08 PM
254 Comments
Joined Mar 2018
PurpleSink3298Jun 10, 2026 11:08 PM
254 Comments
Quote from Yrrdead View quoted comment :
Thinking about this for solar+led night lights for a kids play structure? Overkill or about right?
This can be an awesome setup for a shed or any other off grid small scale setup. I'd pair these with a 80w-100w solar panel and a cheap charge controller. These lifepo4 are fantastic for a setup like that. Kids use stuff until it's dead-dead and that murders SLA batteries. These are built to go all the way dead (built-in cutoff) and they have great capacity and runtime.
I have a similar setup in my shed to power overhead motion controlled work lights and charge the kids power wheel batteries!
1
Jun 10, 2026 11:20 PM
750 Comments
Joined Dec 2004
lowspeedJun 10, 2026 11:20 PM
750 Comments
Quote from DataMeister View quoted comment :
What UPS do these actually go in? Most of them come with Lead Acid, which I assume uses different charging methods.
Curious too. I wonder if it can replace those because of the BMS
Jun 11, 2026 12:03 AM
40 Comments
Joined Sep 2016
LeeC5938Jun 11, 2026 12:03 AM
40 Comments
Quote from Yrrdead View quoted comment :
Thinking about this for solar+led night lights for a kids play structure? Overkill or about right?
At this price pretty solid
Jun 11, 2026 12:04 AM
40 Comments
Joined Sep 2016
LeeC5938Jun 11, 2026 12:04 AM
40 Comments
I was thinking this would be an interesting option for 48v golf cart batteries but then saw post about 10amp max output and that kind of kills it
Jun 11, 2026 12:32 AM
2.3K Comments
Joined Nov 2013
Danimal86Jun 11, 2026 12:32 AM
2.3K Comments
These look like they are meant for a UPS but I can't find the dimensions
Jun 11, 2026 12:50 AM
494 Comments
Joined Nov 2012
agentsteveJun 11, 2026 12:50 AM
494 Comments
Unless you need this specific size or have extreme cost constraints, you can get a much, much more capable battery for just a bit more money. This is 2x the cost but has 5x the capacity, Bluetooth and 5x the output of both batteries here put together.

https://slickdeals.net/f/19593639
Last edited by agentsteve June 10, 2026 at 05:53 PM.
Jun 11, 2026 1:03 AM
28 Comments
Joined Nov 2017
SDHankJun 11, 2026 1:03 AM
28 Comments

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

Quote from DataMeister View quoted comment :
What UPS do these actually go in? Most of them come with Lead Acid, which I assume uses different charging methods.
None. That was the point of my post. They can't deliver enough current.
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Jun 11, 2026 1:04 AM
16 Comments
Joined Apr 2018
SplendidGiraffe8780Jun 11, 2026 1:04 AM
16 Comments
Will those work and fit in a battery backed up garage door opener?

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