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popularIzzy138 | Staff posted Yesterday 03:51 PM
popularIzzy138 | Staff posted Yesterday 03:51 PM

2 Pack ECO-WORTHY 102Wh 12V 8AH LiFePO4 Lithium Battery for UPS $40 + Free Shipping $39.99

$40

$50

20% off
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eco-worthy-us via eBay [ebay.com] has 2-Pack Eco-Worthy 12V 8Ah Lithium LiFePO4 Battery Deep Cycle for UPSon sale for $49.99 - (20%) off when you apply coupon code LONGWEEKEND on the checkout page = $39.99. Shipping is free.

Details:
  • Rated for more than 2000 cycles and maintain 80% capacity after 3000 deep cycles. The service life is more than 8 times that of lead-acid batteries
  • ECO-WORTHY lithium battery has a built-in Battery Management System (BMS) that can protect it from overcharging, deep discharge, overload, overheating and short circuit, and low self-discharge rate.
  • Suitable for Fish Finders, Camper, Electric scooter, Golf Carts, Power wheels, Trolling motor, Tool trailer, RV, Caravan, Marine, Backup power supply, Solar, off-grid, etc.
  • It can be connected in series or in parallel. When connected in series, up to 4 identical batteries can be connected. Parallel connection is unlimited. It can support fast charging or solar panel charging
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Deal Details
Community Notes
About the Poster
eco-worthy-us via eBay [ebay.com] has 2-Pack Eco-Worthy 12V 8Ah Lithium LiFePO4 Battery Deep Cycle for UPSon sale for $49.99 - (20%) off when you apply coupon code LONGWEEKEND on the checkout page = $39.99. Shipping is free.

Details:
  • Rated for more than 2000 cycles and maintain 80% capacity after 3000 deep cycles. The service life is more than 8 times that of lead-acid batteries
  • ECO-WORTHY lithium battery has a built-in Battery Management System (BMS) that can protect it from overcharging, deep discharge, overload, overheating and short circuit, and low self-discharge rate.
  • Suitable for Fish Finders, Camper, Electric scooter, Golf Carts, Power wheels, Trolling motor, Tool trailer, RV, Caravan, Marine, Backup power supply, Solar, off-grid, etc.
  • It can be connected in series or in parallel. When connected in series, up to 4 identical batteries can be connected. Parallel connection is unlimited. It can support fast charging or solar panel charging

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Yesterday 05:59 PM
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Joined Jul 2017
Luigis3rdcousinYesterday 05:59 PM
5,944 Posts
So I don't know how they designed these to work with UPS's but when these battery's (Lifepo4) are charged to 100% all the time it can increase the rate of cell degradation overtime compared to charging to 70-80% max charge. So do these batteries not charge to 100? Where as a traditional lead acid battery or agm battery is designed to be charged to max all the time.
Yesterday 09:16 PM
3,096 Posts
Joined Aug 2017
UkeDogYesterday 09:16 PM
3,096 Posts
Speaking of UPS's, has anyone used these for that? And specifically what make/model UPS will one of these fit inside? TIA
Yesterday 09:43 PM
119 Posts
Joined Oct 2013
rawfishYesterday 09:43 PM
119 Posts
Quote from Luigis3rdcousin :
So I don't know how they designed these to work with UPS's but when these battery's (Lifepo4) are charged to 100% all the time it can increase the rate of cell degradation overtime compared to charging to 70-80% max charge. So do these batteries not charge to 100? Where as a traditional lead acid battery or agm battery is designed to be charged to max all the time.
LFP needs to be charged at a higher voltage than SLA, so the UPS tends to undercharge these batteries. The issue I have with using low AH batteries is that they cannot supply enough current for most UPS applications. Simple 1C discharge calculation, 24V*8A=192W.
Yesterday 10:12 PM
6,762 Posts
Joined Dec 2004
TroublestylistYesterday 10:12 PM
6,762 Posts
Quote from UkeDog :
Speaking of UPS's, has anyone used these for that? And specifically what make/model UPS will one of these fit inside? TIA
it's the standard 8ah ups size. You can check the dimensions.
Yesterday 10:15 PM
6,762 Posts
Joined Dec 2004
TroublestylistYesterday 10:15 PM
6,762 Posts
Quote from Luigis3rdcousin :
So I don't know how they designed these to work with UPS's but when these battery's (Lifepo4) are charged to 100% all the time it can increase the rate of cell degradation overtime compared to charging to 70-80% max charge. So do these batteries not charge to 100? Where as a traditional lead acid battery or agm battery is designed to be charged to max all the time.
But then lead acid batteries still fail in a UPS. As a replacement I'd still trust these even if they never get used. As noted, they won't likely ever get fully charged.

Although I'd probably just throw my UPS away and put in a power station these days.
Last edited by Troublestylist May 19, 2026 at 03:33 PM.
1
Today 01:15 AM
1,066 Posts
Joined Oct 2004
plieplToday 01:15 AM
1,066 Posts
Quote from Troublestylist :
But then lead acid batteries still fail in a UPS. As a replacement I'd still trust these even if they never get used. As noted, they won't likely ever get fully charged.

Although I'd probably just throw my UPS away and put in a power station these days.
That's what I ended up doing, instead of converting my APC UPS to LiFePO4 when the SLA battery finally wore out, I just replaced the whole thing with a Bluetti 2kW LiFePO4 power station. A proper 2kW LiFePO4 power station these days starts at around $400 on discount and has usable capacity that lasts for hours. While an APC UPS is $200-300 and struggles to power a basic computer for 15 minutes.
Today 01:42 AM
633 Posts
Joined Jan 2012
Jedi2155Today 01:42 AM
633 Posts
Quote from rawfish :
LFP needs to be charged at a higher voltage than SLA, so the UPS tends to undercharge these batteries. The issue I have with using low AH batteries is that they cannot supply enough current for most UPS applications. Simple 1C discharge calculation, 24V*8A=192W.
I found a nice thread on the topic on DIYSolar, but I'm wondering what the output current of these things are despite being advertised as "for UPS" I doubt they'll work in a UPS. Most LFP batteries like this have a current limit of around 10A or 1C, which for this one I can't find the specification for anywhere but I suspect is the same. This most likely WILL NOT work in your UPS as advertised. It would most likely only support a max of a 120w-240w for UPS duties.
I have a very popular CyberPower CP1500PFCLCD I bought back in 2019, that is now approaching 7 years on its original SLA batteries (still working though). I was debating upgrading the SLA's to LFP or just stick with a UPS capable power station. One nice about a True UPS like the the cyberpower is that its switchover time is ~4 ms, compared to my current EcoFlow Delta 2 at 30ms, and the Delta 3 at 10 - 15 ms. Both which are far faster than my Tesla Powerwall 2's at ~400 ms.

I had encountered a UPS issue when I upgraded my PC to a RTX 5090 where UPS would start tripping over 1000W, but I solved that by downgrading my 5090 back to a 5080, so my power draw now is back to 700-800W.

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Today 02:04 AM
1,066 Posts
Joined Oct 2004
plieplToday 02:04 AM
1,066 Posts
Quote from Jedi2155 :
I found a nice thread on the topic on DIYSolar, but I'm wondering what the output current of these things are despite being advertised as "for UPS" I doubt they'll work in a UPS. Most LFP batteries like this have a current limit of around 10A or 1C, which for this one I can't find the specification for anywhere but I suspect is the same. This most likely WILL NOT work in your UPS as advertised. It would most likely only support a max of a 120w-240w for UPS duties.
I have a very popular CyberPower CP1500PFCLCD I bought back in 2019, that is now approaching 7 years on its original SLA batteries (still working though). I was debating upgrading the SLA's to LFP or just stick with a UPS capable power station. One nice about a True UPS like the the cyberpower is that its switchover time is ~4 ms, compared to my current EcoFlow Delta 2 at 30ms, and the Delta 3 at 10 - 15 ms. Both which are far faster than my Tesla Powerwall 2's at ~400 ms.

I had encountered a UPS issue when I upgraded my PC to a RTX 5090 where UPS would start tripping over 1000W, but I solved that by downgrading my 5090 back to a 5080, so my power draw now is back to 700-800W.
I had an HP workstation that had an 1125 watt PSU that wouldn't work with an APC UPS even though the workstation only drew 600 watts full tilt with a RX 6800 XT. The UPS did not seem to like that initial surge when the PC was turned on and just refused to work with it.

Dedicated UPS are nice if you need that ultra-fast response time for extremely sensitive gear but for a computer with a good quality PSU, anything under 20ms is fast enough, and any good power station should be able to hit 15 ms or faster for their UPS mode.
Today 02:25 AM
586 Posts
Joined Oct 2011
blupupherToday 02:25 AM
586 Posts
Quote from pliepl :
That's what I ended up doing, instead of converting my APC UPS to LiFePO4 when the SLA battery finally wore out, I just replaced the whole thing with a Bluetti 2kW LiFePO4 power station. A proper 2kW LiFePO4 power station these days starts at around $400 on discount and has usable capacity that lasts for hours. While an APC UPS is $200-300 and struggles to power a basic computer for 15 minutes.
Problem is many of the "UPS" power stations don't have true voltage regulation.
I know I got a River 3 Plus that has <10ms switchover, but the voltage regulation is horrible, it can be as low as 70v and as high as 140v before it switches over to battery. I was using it on a home theater setup (TV, speakers, desktop computer, Roku and network switch, like 180w when everything was on) and in brown outs, the PC would reboot.
I ended up keeping my old APC with a bad battery and plugged that into the wall, then the River 3 Plus is plugged into that, so the APC will try to switch to battery when voltage gets below 109v or above 130v (what I set it to), and since the battery is dead, it cuts power, and the River 3 switches over to battery. This has fixed the issue for me, but is not ideal. I also have a River 3 Plus on my network gear, but since all that does 120v to 12v, it does not seem to care.
Not sure if the Anker/Bluetti/Oupes models have the same issue.
Last edited by blupupher May 19, 2026 at 07:27 PM.
Today 03:55 AM
577 Posts
Joined Apr 2009
JDub8Today 03:55 AM
577 Posts
Quote from rawfish :
LFP needs to be charged at a higher voltage than SLA, so the UPS tends to undercharge these batteries. The issue I have with using low AH batteries is that they cannot supply enough current for most UPS applications. Simple 1C discharge calculation, 24V*8A=192W.
It really depends on the cell model#. Many lifepo4 manufacturers make cells that can do 2c, 3c even up to like 6c. While Chinese manufacturers and sellers definitely dont deserve the benefit of the doubt ecoworthy generally makes stuff thats "good enough" at a good price.

Also most UPS dont run 24v, most are 12v. You need to at least know how many cells are in the pack, as well as their C rating before you can know its power output ability.
Last edited by JDub8 May 19, 2026 at 09:03 PM.

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