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?
  1. Deal Image
Item 1 of 10
  1. Deal Image
  2. Deal Image
  3. Deal Image
  4. Deal Image
Item 1 of 10
expiredSickerDealer posted Mar 8, 2026 3:18 PM

Certified Refurbished ECO-WORTHY 48V 50Ah Metal Case LiFePO4 Lithium Battery $319.99 at eco-worthy-us01 via eBay

$320

$400

20% off
eBay
13 Comments
5.1K Views
Visit eBay
Deal Details
Certified Refurbished ECO-WORTHY 48V 50Ah Metal Case LiFePO4 Lithium Battery $319.99

Apply code FRESHFIND20 at checkout.

Free shipping and free return.

https://www.ebay.com/itm/306143485847
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Certified Refurbished ECO-WORTHY 48V 50Ah Metal Case LiFePO4 Lithium Battery $319.99

Apply code FRESHFIND20 at checkout.

Free shipping and free return.

https://www.ebay.com/itm/306143485847

Community Voting

Deal Score
+8
Good Deal
Visit eBay

Join The Conversation

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

13 Comments

Sign up for a Slickdeals account to remove this ad.

Mar 8, 2026 4:06 PM
184 Posts
Joined May 2019
Brendan1901Mar 8, 2026 4:06 PM
184 Posts
question for the experts. refurb lithium batteries; how do we know how many cycles are on them?
1
Mar 8, 2026 4:13 PM
202 Posts
Joined Jul 2017
Moscar80Mar 8, 2026 4:13 PM
202 Posts
Quote from Brendan1901 :
question for the experts. refurb lithium batteries; how do we know how many cycles are on them?
For the regular 300Ah versions, the overkill BMS app says how many cycles when you first connect. Not sure about these 50ah (equal to one 12v 200AH battery), but I presume higher discharge rate since it is golf cart version and would hope the difference is more than just a metal housing and prewired series/parallel connection since if I was doing it myself I'd prefer 4 of the 100AH for the same price after coupon (or within 40 bucks I think)......IF and big IF..they are same discharge rate/performance (meaning I get more for my $ with the PITA being I wire them together myself...big whoop).
Mar 8, 2026 4:40 PM
142 Posts
Joined Aug 2009
DigitalSteveMar 8, 2026 4:40 PM
142 Posts
I have had 4 of these for over a year and no problems so far. Not sure what a refurb would be, maybe just returns. Paid more than $700 each on sale.
Mar 8, 2026 11:37 PM
22 Posts
Joined May 2025
FabulousRoute426Mar 8, 2026 11:37 PM
22 Posts
Can this be used like the other eco worthy batteries as a backup to ecoflow?
Mar 9, 2026 12:11 AM
60 Posts
Joined Jan 2016
wrowleyMar 9, 2026 12:11 AM
60 Posts
These are probably good for those who don't want to lift the near 100 lb. larger 100Ah batteries
Mar 9, 2026 12:18 AM
6,618 Posts
Joined Dec 2004
CaleoMar 9, 2026 12:18 AM
6,618 Posts
Quote from FabulousRoute426 :
Can this be used like the other eco worthy batteries as a backup to ecoflow?
Yes. I think most (if not all) Ecoflow units support up to 60V input power so this would be ideal vs a 12 or 24V LFP battery (which would be limited to around 200W and 380W respectively). With 2x500W (15A) MPPT input per port on the Delta 3 Plus, you'll be able to get 1000W input off this one battery. Use a fuse and decent size wires though because 30A continuous is a pretty serious draw.
Mar 9, 2026 1:11 AM
247 Posts
Joined Oct 2015
JamesH1227Mar 9, 2026 1:11 AM
247 Posts
Quote from Caleo :
Yes. I think most (if not all) Ecoflow units support up to 60V input power so this would be ideal vs a 12 or 24V LFP battery (which would be limited to around 200W and 380W respectively). With 2x500W (15A) MPPT input per port on the Delta 3 Plus, you'll be able to get 1000W input off this one battery. Use a fuse and decent size wires though because 30A continuous is a pretty serious draw.
There's a new trick these days where you can put a resistor across a couple of pins on the expansion port and a relay inside enables it.. Then you can use any 48v battery wired up to it if you do that. I think someone might make cables too. If you do it this way, the Ecoflow unit can also charge the battery.

Sign up for a Slickdeals account to remove this ad.

Mar 9, 2026 1:22 AM
6,618 Posts
Joined Dec 2004
CaleoMar 9, 2026 1:22 AM
6,618 Posts
Quote from JamesH1227 :
There's a new trick these days where you can put a resistor across a couple of pins on the expansion port and a relay inside enables it.. Then you can use any 48v battery wired up to it if you do that. I think someone might make cables too. If you do it this way, the Ecoflow unit can also charge the battery.
That sounds... sketchy and warranty-voiding, lol.. but I'm curious. Got a link?
Mar 9, 2026 10:44 AM
52 Posts
Joined Jul 2021
WWJBMar 9, 2026 10:44 AM
52 Posts
Quote from Caleo :
That sounds... sketchy and warranty-voiding, lol.. but I'm curious. Got a link?
Plenty of YouTube videos on this.
Mar 9, 2026 10:52 AM
52 Posts
Joined Jul 2021
WWJBMar 9, 2026 10:52 AM
52 Posts
Maybe I'm mistaken, but these don't appear to have bluetooth for monitoring via an app.
Mar 9, 2026 4:54 PM
247 Posts
Joined Oct 2015
JamesH1227Mar 9, 2026 4:54 PM
247 Posts
Quote from Caleo :
That sounds... sketchy and warranty-voiding, lol.. but I'm curious. Got a link?
Hopefully this post doesn't get blocked, but here's one video about it: https://www.youtube.com/watch?v=qPfIATEccrI
It may mostly work only with the Delta 2 and Delta 2 Max, but the guy in this video mentions that there may be other models it works with.
Mar 14, 2026 11:52 AM
9 Posts
Joined Feb 2020
rippleish20Mar 14, 2026 11:52 AM
9 Posts
Quote from JamesH1227 :
There's a new trick these days where you can put a resistor across a couple of pins on the expansion port and a relay inside enables it.. Then you can use any 48v battery wired up to it if you do that. I think someone might make cables too. If you do it this way, the Ecoflow unit can also charge the battery.
It works with Delta Pro 3's also. There are several YT vidoes where people have done. this, one with showing it being done with several ecoflow models (deltas) and a link to an image that shows what pins need to have the resistor . It only works with specific models. I cut a DP3 cable rather than trying to add the resistor at the device itself. You have to start with both the device and battery charged to 100%. You can also connect the battery to the solar port of models that support 60+ volts but it's not bidirectional. The ecoflow could use the battery but the battery would have to be charged independently
Last edited by rippleish20 March 14, 2026 at 04:54 AM.
Mar 16, 2026 4:09 PM
6,781 Posts
Joined Dec 2004
TroublestylistMar 16, 2026 4:09 PM
6,781 Posts
What's the "standard" method for connecting these together? Bus bars? Manufacturer cables? Custom cables?

I'm thinking of a parallel setup for 48v inverter. Like it mentions a 4p setup being supported.

TIA.

Join The Conversation

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

Related Searches

Tech & ElectronicsTech AccessoriesBatteriesECO-WORTHYeBay

Popular Deals

See All
Found by ItsSoCheap
Today 4:03 AM
Forum Thread
Sunpak Tri-Monopod w/ 3-Way Pan-and-Tilt Head $15.95 + Free Shipping on $49+$16$40
60% off
2
Found by Immortalsolitude
Today 3:44 AM
Forum Thread
Kamp-Rite Outdoor Shade Camping Awning for SUV Sport Vehicle & Carry Bag Green $29.99$30$126
76% off
2
Found by phoinix
Today 7:15 AM
Forum Thread
[AC] $10.53* | 4-Pk 12-Ct 2.5-Gallon Hefty Slider Jumbo Storage Bags at Amazon$11$27
59% off
0
Found by Red_Liz
Yesterday 1:00 PM
Forum Thread
OLIGHT Ostation X Smart 32-Battery 3-in-1 AA Charger or 36-Battery AAA Charger $60 + Free Shipping$60$120
50% off
8
Found by babgaly
Today 2:05 AM
Forum Thread
Pudolla Men's Sun Protection Long Sleeve Fishing Swim Shirts w/ UPF 50 (Various) $13.91 + Free Shipping w/ Prime or on $35+$14$24
41% off
2

Trending Deals

See All
Found by phoinix
Today 6:21 AM
Forum Thread
[AC] $10 | 2 × 12-Pk 12-Oz Dr Pepper Zero Sugar Creamy Coconut Soda ($5 each) at Amazon$10$17
41% off
2
Found by Navy-Wife
Today 7:19 AM
Forum Thread
52" Ohniyou Low Profile 5-Blade 6-Speed Ceiling Fan w/ LED Light & App/Remote Control (3 colors) from $45.58 + Free Shipping$46$100
54% off
1
Found by phoinix
Today 5:05 AM
Forum Thread
$19.99 | NestEase Brush Head for Dyson V7 V8 V10 at Woot!$20$60
66% off
1
Found by phoinix
Today 5:55 AM
Forum Thread
[SnS, AC] $4.65** | 16-Oz Neutrogena Ultra Gentle Foaming & Hydrating Face Wash at Amazon$4.65$12
61% off
1
Found by wileysmiley
Today 12:57 AM
Forum Thread
PowerA Enhanced Wireless Controller for Nintendo Switch/Switch 2/Switch Lite/OLED (Black) - $29.99 + free ship w/ Prime$30$70
57% off
1