Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Heads up, this deal has expired. Want to create a deal alert for this item?
expiredMeowssi | Staff posted Mar 04, 2024 06:06 PM
expiredMeowssi | Staff posted Mar 04, 2024 06:06 PM

Eco-Worthy LiFePO4 Batteries: 12V 50Ah Battery $96, 12V 30Ah Battery

& More + Free S/H

$64

$85

24% off
eBay
168 Comments 77,089 Views
Visit eBay
Good Deal
Save
Share
Deal Details
Update: This popular deal is still available.

Eco-Worthy-US via eBay has select Eco-Worthy LiFePO4 Lithium Iron Phosphate Multi-Purpose Batteries on sale for the prices listed below when you apply Extra 20% Off coupon code SPRINGSAVE20 at checkout. Shipping is free.

Thanks to Deal Hunter Meowssi for finding this deal.

Examples (prices after code SPRINGSAVE20):

No Longer Available:

Editor's Notes

Written by powerfuldoppler | Staff
  • About this deal:
    • Coupon offer valid through March 17, 2024 at 11:59PM Pacific Time while supplies last.
  • About this store:
    • eBay Seller Info:
      • eco-worthy-us (8,948 feedback rating)
      • 98.2% Positive feedback
    • Return Policy:
      • 30 day returns (Buyer pays for return shipping).
  • Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

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

Eco-Worthy-US via eBay has select Eco-Worthy LiFePO4 Lithium Iron Phosphate Multi-Purpose Batteries on sale for the prices listed below when you apply Extra 20% Off coupon code SPRINGSAVE20 at checkout. Shipping is free.

Thanks to Deal Hunter Meowssi for finding this deal.

Examples (prices after code SPRINGSAVE20):

No Longer Available:

Editor's Notes

Written by powerfuldoppler | Staff
  • About this deal:
    • Coupon offer valid through March 17, 2024 at 11:59PM Pacific Time while supplies last.
  • About this store:
    • eBay Seller Info:
      • eco-worthy-us (8,948 feedback rating)
      • 98.2% Positive feedback
    • Return Policy:
      • 30 day returns (Buyer pays for return shipping).
  • Please see original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by Meowssi | Staff

Community Voting

Deal Score
+47
Good Deal
Visit eBay

Leave a Comment

Unregistered (You)

Top Comments

Azrael_the_Cat
5095 Posts
793 Reputation
Look, I appreciate you engaging but I've been designing battery charges for a long time.

you are misunderstanding the old school ways of setting charge modes and profiles for lead acid batteries. the charge mode and float mode are legacy methods associated with iron core transformers and liner voltage regulators when you needed to physically switch between current levels and voltage levels.

modern chargers current charge up to a taper voltage level then switch to constance voltage mode which is typically 13.5-13.8v. anyway I am sure your understanding is lost in semantic nuances. it's not your fault but I want to help people in the thread understand how it works enough to have the right perceptions.

I won't get into the chemistry but when you put an SLA cell above about 14 ish volts you start to dissociate hydrogen in the electrolyte. That is gas. You may have noticed flooded batts are vented and SLA batteries have pressure release valves built in for this reason to prevent bad things Smilie. see this great article here
https://www.batteriesplus.com/blo...ry-venting


Don't tell me to stop. I'm just correcting you erroneous statements I'm not trying to pick on you. I think you are just extrapolating wrong statements from some simple misunderstandings of the electronics and battery systems

Trust an EE PhD as hard as that might be.

have a great day. and happy to direct you to good articles if interested.
Ghatid
891 Posts
279 Reputation
They're bare bones batteries (with BMS). Point me to a blue tooth monitoring + low/high temp protection battery at these prices. 100Ah 12v for $160.
cptskippy
445 Posts
102 Reputation
SLA and LiFePO battery chemistries have different charging voltages. An SLA battery has a range from ~11.59-12.46v corresponding to 0% and 100% state of charge. A LiFePO battery's range however is ~10-14.6v.

The charger in a UPS is designed for SLA will cut off charging when the battery reaches 12.46v and shut off the UPS when the battery drops close to 11.59v. That means the LiFePO will never be full charged or discharged. So in that sense it's safe to use in a UPS.

However because it will keep the battery to SLA specs, you'll only be using approximately 23% of the battery's capacity. So that 10ah LiFePO will behave more like a 2.25ah SLA battery in the UPS.

168 Comments

Sign up for a Slickdeals account to remove this ad.

Mar 05, 2024 10:02 PM
1,795 Posts
Joined Feb 2013
AustinM8565Mar 05, 2024 10:02 PM
1,795 Posts
Quote from Ilovedeals :
Anyone use the 10Ah for their UPS? I read very mixed messages. Some say it works fine with BMS and others say it is a bad idea and lead acid is better for UPS. If it lasts more than twice as long as lead acid it might be worth it.
If you put these in a lead acid ups you are not going to have a good time
1
Mar 05, 2024 10:13 PM
2,117 Posts
Joined Mar 2006
TRUMP_XDMar 05, 2024 10:13 PM
2,117 Posts
Quote from Tsumi :
Nope, they won't provide the cranking amps needed. Look at Antigravity Batteries for starter LFP batteries- they are very pricey.



They excel in any situation where surge current doesn't happen and just needs to provide power for a long period of time. Get a proper LFP charger to get the most out of it.



LFP falls towards the Li-Ion side of the spectrum, quite closely in fact. Lower maximum output for the battery size as compared to Li-Ion but almost no fire risk. They are different enough that you need a LFP charger to get the most out of it.

Many people replace their RV deep cycle LA batteries with LFP. It's more than just a simple swap though as you will need charge controllers and isolaters, depending on the setup. Lots of info if you google for it.



Tool batteries are generally Li-Ion, not LFP.
Golf carts are another major lifepo4 use… just make sure u have the right BMS continuous and BMS max that your cart needs…. Looks like only the 150ah eco-worthy (and the higher 200+ah one) have BMSs hight enough to work for a stock golf cart… I want to pull the trigger to replace my trojan lead acids in my 48v Yamaha cart…. But not quite sure if getting 2x24v eco worthy in 150ah will cause issues with balancing when running in series to hit 48v needed for my cart… 🤔 anybody try this on a cart yet???
1
Mar 05, 2024 10:37 PM
1,795 Posts
Joined Feb 2013
AustinM8565Mar 05, 2024 10:37 PM
1,795 Posts
I have a question. I want to build a battery backup for a sump pump and possibly my server rack in the basement. I understand that these have a BMS system built into them so I won't need to buy one of those but what exactly do you need to buy to have it charge and switch over when the power goes out?
Last edited by AustinM8565 March 5, 2024 at 02:50 PM.
1
Mar 05, 2024 10:50 PM
547 Posts
Joined Nov 2017
drzkMar 05, 2024 10:50 PM
547 Posts
Quote from cptskippy :
SLA and LiFePO battery chemistries have different charging voltages. An SLA battery has a range from ~11.59-12.46v corresponding to 0% and 100% state of charge. A LiFePO battery's range however is ~10-14.6v.

The charger in a UPS is designed for SLA will cut off charging when the battery reaches 12.46v and shut off the UPS when the battery drops close to 11.59v. That means the LiFePO will never be full charged or discharged. So in that sense it's safe to use in a UPS.

However because it will keep the battery to SLA specs, you'll only be using approximately 23% of the battery's capacity. So that 10ah LiFePO will behave more like a 2.25ah SLA battery in the UPS.
I don't think this is correct. You conflated floating voltage of SLA to charging voltage of LiFePo4. Charging of SLA is generally 13.8, and charging of LiFePO4 14.4 at low end. Capacity loss of LiFePO4 on an SLA charger will be ~20%. Or 80% SOC.
1
Mar 05, 2024 10:55 PM
1,520 Posts
Joined Sep 2015
solomaMar 05, 2024 10:55 PM
1,520 Posts
Quote from RelaxedPenguin2752 :
I know several people that replaced there kids ride on toy batteries with 18v and 20v power tool lithium batteries , I don't see why this would not work also .the 12v 30a is called a rv battery in the description.
You contradict yourself. They replaced with lithium Ion . This one lifepo4 battery.
Lithium Ion can discharge at 10-20C and more. This lifepo4 is 1C only. Ride on wouldn't start on this battery
Mar 05, 2024 11:03 PM
1,520 Posts
Joined Sep 2015
solomaMar 05, 2024 11:03 PM
1,520 Posts
Quote from drzk :
I don't think this is correct. You conflated floating voltage of SLA to charging voltage of LiFePo4. Charging of SLA is generally 13.8, and charging of LiFePO4 14.4 at low end. Capacity loss of LiFePO4 on an SLA charger will be ~20%. Or 80% SOC.
Not really. Charging for sla is 14.4-14.8 and 13.8 is float.
You can charge lifepo4 with 13.6V (3.4V per cell). 14.4 will provide fast charge. 13.6V is a slow charge
For sla you need higher voltage to start process, for lifepo4 you need higher voltage to speedup process
Mar 06, 2024 12:18 AM
392 Posts
Joined Dec 2009
varncoMar 06, 2024 12:18 AM
392 Posts
I currently have a 18AH lifepo battery. Am I able to connect my current battery and a new, say 30AH battery in parallel to get 48AH?

Sign up for a Slickdeals account to remove this ad.

Mar 06, 2024 12:56 AM
2,117 Posts
Joined Mar 2006
TRUMP_XDMar 06, 2024 12:56 AM
2,117 Posts
Quote from soloma :
You contradict yourself. They replaced with lithium Ion . This one lifepo4 battery.
Lithium Ion can discharge at 10-20C and more. This lifepo4 is 1C only. Ride on wouldn't start on this battery
What is 10-20C and 1C u are referring to? I don't see "C" in the specs?
1
Mar 06, 2024 01:08 AM
4 Posts
Joined Aug 2014
jcarner84Mar 06, 2024 01:08 AM
4 Posts
In for the 10ah. Been looking for a battery for my light for flounder gigging.
Mar 06, 2024 01:47 AM
1,812 Posts
Joined Nov 2005
g10nyMar 06, 2024 01:47 AM
1,812 Posts
Quote from sjaxkingpin :
LOL, not asking for much in your $159 100ah LIFEPO4 are you?

Those "are" both features, but if you know of somewhere to get those features anywhere near these prices, by all means share with the class, I'll buy several.

If you are comfortable buying LIFEPO4 from EBay, these are some exceptional prices.
About that exceptional attribute: the lowest I could find a price for a 12 V 100 AH LFP battery on Amazon, with probably similar quality, was $170, but lately it hasn't come back down to that. So this is $10 better than that.

Now, this is the second time Eco-Worthy is being offered with a 20% discount on ebay in a month. Last time the tax was applied on the pre-coupon price, so this is something to look into at checkout (a few bucks so no biggie.)
Mar 06, 2024 01:48 AM
1,812 Posts
Joined Nov 2005
g10nyMar 06, 2024 01:48 AM
1,812 Posts
Quote from varnco :
I currently have a 18AH lifepo battery. Am I able to connect my current battery and a new, say 30AH battery in parallel to get 48AH?
Kirchhoff says yes, but only if the two batteries provide the same voltage.
Mar 06, 2024 02:12 AM
439 Posts
Joined Apr 2007
porshuhMar 06, 2024 02:12 AM
439 Posts
Quote from RelaxedPenguin2752 :
I know several people that replaced there kids ride on toy batteries with 18v and 20v power tool lithium batteries , I don't see why this would not work also .the 12v 30a is called a rv battery in the description.
Agreed. And my friend put a 24v SLA battery in his kid's 12v power wheels and it doubled the power and speed. Of course with risk of burning out the Electronic Speed Controller....but putting in a 12.8v one of these LiFePO4 batteries would sure extent the range of whatever you put it in! I'd go for the 100aH for sure.
Mar 06, 2024 02:31 AM
359 Posts
Joined Mar 2021
CyanCorn8418Mar 06, 2024 02:31 AM
359 Posts
Quote from AustinM8565 :
If you put these in a lead acid ups you are not going to have a good time
They work fine in an SLA UPS. I think you need to be more aware of how high your actual throughput might be and might need to go with 20ah batteries over the 10ah ones - I think a pair of these 10ah batteries can handle 500 watts output. I use a couple 10ah lfe batteries in a newer APC unit and it works fine, however, they will not work with my other apc sua1000 unit - I suspect it's that the batteries fail that unit's self test.
Mar 06, 2024 03:11 AM
877 Posts
Joined Jul 2015

This comment has been rated as unhelpful by Slickdeals users.

Sign up for a Slickdeals account to remove this ad.

Mar 06, 2024 03:12 AM
2,650 Posts
Joined Jan 2007
gobblygookMar 06, 2024 03:12 AM
2,650 Posts
Quote from CheesisChrist :
No HDMI output either. Smh
Not that stupid nonsense again.
4

Leave a Comment

Unregistered (You)

Popular Deals

Trending Deals