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Old 01-17-2019, 09:52 PM
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ZackN920 ZackN920 is offline
350 Buick
 
Join Date: Nov 18, 2015
Location: Stephenson County, IL
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How long will an un-used 12v car battery last?

Yea, odd situation. My mom and step dad gave me an old car battery that they had in the basement on either a bench, or shelf. They never put it to use, as the vehicle ended up getting totaled right before installing it. The battery is from 11/2008. Its a 7 year Farm & Fleet battery rated for 800cca. I checked voltage and its sitting at about 3.1v.


I don't know if the fact that it hasn't been through heat cycles and generally "used" would extend life, or if battery life is just strictly dependent on the passage of time. I'm kind of leaning towards the side of just junking it. I 'll put a charger on it and see if it takes, but I'm figuring that it won't or that it will, but just wont have much life to it.

What do you think? What's the "shelf life" lifespan?
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1990 Grand Wagoneer-"The Crapwagon"
AMC 360, TF727, NP229, 3.31gears, 2" lift
Rancho 44044, Rusty's 2" AAL, TFI
...not too rusty anymore
Plenty of patina

The others
1926 Dodge Brothers Business Sedan 212 I4-CRANK START
1987 Lincoln Town Car Signature Series-5.0 AOD (WD)
1987 Dodge Dakota LE 3.9, A999, 3.90 gear (DD)
1994 GMC 'Burban 5.7, 4L60E, NP241, 3.42 gear (DD)
2001 Jeep Cherokee 4.0, AW4, NP231, 3.73 (limbo)
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  #2  
Old 01-17-2019, 10:32 PM
joe joe is offline
 
Join Date: Apr 28, 2000
Location: PNWet, USA
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Once a batt has been activated the worst thing you can do is not use it. If it's been ten years I suspect it's junk now. When you're done trying to charge it, let it sit overnight to stabilize before reading the voltage. You may get lucky but i doubt it.
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Old 01-18-2019, 08:07 AM
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SkylinePCG SkylinePCG is offline
258 I6
 
Join Date: Jan 11, 2005
Location: Long Island, NY
Posts: 263
ItIt’s a gamble at best, and it won’t be a sunny free-time day when it throws in the towel. Use it as a core exchange for an Interstate refurb?
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1980 Cherokee WT

360, 727, 219, 35s
Holley 4bbl, Edelbrock performer intake/cam, TFI, Hedman LT headers, HB brakes, aaaand GW seats!

Still on the shelf... Hamilton EFI, Transgo TF-2...
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Old 01-18-2019, 11:00 AM
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Cecil14 Cecil14 is offline
 
Join Date: Jan 22, 2001
Location: Carson City, NV
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That is not a battery you'll want to trust, even if it does take and hold a charge right now. As mentioned, that's a core.


aa
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Old 01-18-2019, 03:20 PM
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Mass Mass is offline
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Join Date: Sep 26, 2017
Location: Dallas
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Can't hurt to try charging it over night.

Family has an old ford tractor with a 12 year old tractor supply battery and it still works. Jump it off after winter and works all spring and summer.
I would lean on the "it's dead" side though but you never know. Also agree that it's not a battery I would trust in a daily driver.
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  #6  
Old 01-18-2019, 08:38 PM
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Tripwire Tripwire is offline
hey,does anyone here know how to.......
 
Join Date: Jul 30, 2000
Location: WA State
Posts: 4,405
i kinda side with joe...

i work on ups's and fire alarm /house alarm systems, once you charge one either traditional or gel style if you let them sit they mysteriously die for no reason - wont even accept a charge to make them useful - use it as a core
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86 GrandWag. Howell fuel Injected 360. MSD Ignition + Dizzy. 727/229 swap BJ's 2" Lift and 31's

88 Wrangler 4.2, Howell TBI and MSD - Borla Headers w/ Cat-back + winch and 31's AND a M416 trailer (-:
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  #7  
Old 01-22-2019, 02:45 PM
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FSJunkie FSJunkie is offline
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Location: Not The Hot Part, Arizona
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Batteries last a really long time if they are charged, stay charged, and that is all they ever do.

They don't last a long time after they get discharged. The plates sulfate and then it's done for. Or it freezes. A fully discharged battery freezes at 25 degrees, which blows the plates apart inside.


I'm betting it's pretty shot.
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  #8  
Old 01-22-2019, 09:17 PM
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ZackN920 ZackN920 is offline
350 Buick
 
Join Date: Nov 18, 2015
Location: Stephenson County, IL
Posts: 906
Thanks everybody. I was thinking the same thing, that it'd be bad after all that time.

Well, put a charger on it today and......Nothin'! Didn't take at all. So, I got a core. Too bad I wont get anything for it.
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1990 Grand Wagoneer-"The Crapwagon"
AMC 360, TF727, NP229, 3.31gears, 2" lift
Rancho 44044, Rusty's 2" AAL, TFI
...not too rusty anymore
Plenty of patina

The others
1926 Dodge Brothers Business Sedan 212 I4-CRANK START
1987 Lincoln Town Car Signature Series-5.0 AOD (WD)
1987 Dodge Dakota LE 3.9, A999, 3.90 gear (DD)
1994 GMC 'Burban 5.7, 4L60E, NP241, 3.42 gear (DD)
2001 Jeep Cherokee 4.0, AW4, NP231, 3.73 (limbo)
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  #9  
Old 01-23-2019, 12:27 AM
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Cecil14 Cecil14 is offline
 
Join Date: Jan 22, 2001
Location: Carson City, NV
Posts: 5,095
A lot of times you'll need more current than your average charger can provide to force a charge back into a really dead battery. I've seen guys hook a known good battery up in parallel to a dead battery to jump start things. Charger -> good battery -> dead battery. I've never tried it, I've never been willing to risk a good battery for a dead one.


aa

edit: hook them up in parallel NOT series. Pretty sure I must've been drunk when I wrote that out.
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1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank

Last edited by Cecil14 : 01-23-2019 at 09:28 AM.
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  #10  
Old 01-24-2019, 08:29 PM
ZackN920's Avatar
ZackN920 ZackN920 is offline
350 Buick
 
Join Date: Nov 18, 2015
Location: Stephenson County, IL
Posts: 906
Im not willing to sacrifice a good battery...so NO.

Hmm, more current huh. Well, it wasn't sizzling. Maybe I should try the big floor standing charger/starting unit I got and set it to start mode...
If I do that though, I kinda don't want to be near it... Don't really care for battery explosions!
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1990 Grand Wagoneer-"The Crapwagon"
AMC 360, TF727, NP229, 3.31gears, 2" lift
Rancho 44044, Rusty's 2" AAL, TFI
...not too rusty anymore
Plenty of patina

The others
1926 Dodge Brothers Business Sedan 212 I4-CRANK START
1987 Lincoln Town Car Signature Series-5.0 AOD (WD)
1987 Dodge Dakota LE 3.9, A999, 3.90 gear (DD)
1994 GMC 'Burban 5.7, 4L60E, NP241, 3.42 gear (DD)
2001 Jeep Cherokee 4.0, AW4, NP231, 3.73 (limbo)
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