Recent Topics
2019 J.D. Power VDS
by buster - 09/17/19 09:05 AM
Possible to add catch can?
by cwilliamsws6 - 09/17/19 09:02 AM
Update on GF-6
by buster - 09/17/19 08:40 AM
motul eco-lite 5w30
by avi1777 - 09/17/19 07:47 AM
Hyundai sonata 2.4l burning oil
by Grambo - 09/17/19 07:22 AM
Mazda CX5 2.5 oil question
by Tallman - 09/17/19 06:54 AM
Can I use 10W40 gtx HM in cold winter like -5F?
by Cheburashka - 09/17/19 06:43 AM
BMW Longlife-04: Evolving Performance Requirements
by Bjornviken - 09/17/19 06:40 AM
Do you use gas brand exclusively ?
by MetalSlug - 09/17/19 04:58 AM
Mobil 15w30
by Chadders99 - 09/17/19 02:20 AM
2018 VW Atlas 3.6 4 Motion Reliability?
by GZRider - 09/16/19 11:48 PM
Account and posts removal
by newbe46 - 09/16/19 10:00 PM
Yamaha EF2800i break-in
by Uregina09 - 09/16/19 09:43 PM
Adding TCW3 to Gas Tank?
by maverickfhs - 09/16/19 08:45 PM
Motul 75w90 1L 12 pack $13.25
by wkcars - 09/16/19 08:36 PM
2019 Ford Fusion vs used?
by FL-400S - 09/16/19 08:33 PM
What is the reasoning for 2-fuel tanks on a rv?
by RazorsEdge - 09/16/19 07:54 PM
Thoughts and opinions on family haulers
by ram_man - 09/16/19 07:53 PM
Newest Members
R0CKETMAN, Southbend9, Bigaledge32, emilio15, Kokopelli34179
69303 Registered Users
Who's Online Now
97 registered members (5W50Spooge, 330indy, Anduril, Alfred_B, A310, 2004tdigls, 4 invisible), 1,942 guests, and 20 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics294,680
Posts5,064,448
Members69,303
Most Online3,532
Jul 30th, 2019
Donate to BITOG
Print Thread
Hop To
Page 1 of 3 1 2 3
When to Replace Battery? #4831474 08/04/18 11:12 PM
Joined: May 2002
Posts: 1,523
TheLoneRanger Offline OP
OP Offline
Joined: May 2002
Posts: 1,523
I read that a battery should be replaced when the voltage drops to 12.4v on a fully charged battery.
Is this true?


Some days you eat the bear, some days the bear eats you.....
Re: When to Replace Battery? [Re: TheLoneRanger] #4831480 08/04/18 11:32 PM
Joined: Apr 2012
Posts: 7,185
W
Wolf359 Offline
Offline
W
Joined: Apr 2012
Posts: 7,185
There are many battery state of charge charts out there like this one:

https://modernsurvivalblog.com/alternative-energy/battery-state-of-charge-chart/

The temperature of the battery is also important as the voltage will be lower when it's colder.

Basically you replace a battery when it fails a load test. Most auto parts stores will do a free load test for you. It's possible to get a 12+ voltage reading but once you put a load on it, you get no current.

I suppose you could just buy one too. Maybe one of these two?

https://www.amazon.com/Schumacher-BT-100-Battery-Load-Tester/dp/B000AMBOI0

https://www.amazon.com/Bastex-Battery-Insulated-Carrying-Automotive/dp/B01N75BLH5

Re: When to Replace Battery? [Re: TheLoneRanger] #4831481 08/04/18 11:33 PM
Joined: Nov 2017
Posts: 629
K
KneeGrinder Offline
Offline
K
Joined: Nov 2017
Posts: 629
It depends on your tolerance to your vehicle not starting or leaving you stranded someday. A "Good" battery will hold 12.6 volt over night when fully charged and still connected to your vehicle. A 12 volt battery is considered flat or dead at 12 volts. Fully charged and connected to your vehicle should hold no less than 12.4/12.3 if you have a little 4cyl motor. A diesel pick up truck will be close to S.O.L. at 12.3 volt overnight, and that's with 2- 12 volt batteries.


08 Tribeca 90k PUP 5w30
06 Accord 137k PP 0w20
03 Acura CL-S 90k M1 AP 5W20
02 Acura TL-S 241k ST 5W30
02 Accord EX 155k PP 0W20
02 K3500 99k M 1 ESP 5w40
00 F350 139k M 1300 15w40
Re: When to Replace Battery? [Re: TheLoneRanger] #4831492 08/04/18 11:53 PM
Joined: Mar 2012
Posts: 1,640
E
E150GT Offline
Offline
E
Joined: Mar 2012
Posts: 1,640
I start looking for replacement and testing the battery when i hear the engine start to crank slower and charging seems to do nothing. I know the end is near. I don't want to be stranded somewhere. Thats a pain.Its also better to replace before absolutely necessary so you can decide what battery you want and maybe even get in on sale. When you're stuck somewhere, you usually get the closest or easiest to get battery. I don't know if it helps but I like to periodically put my batteries on the maintenance charger. I haven't driven a whole lot lately and I just charged the mazda and f150 batteries and it took all day for both, even though they both started the vehicles without issue. I like to think I am helping them last longer but who knows.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 68k 5w30
2006 Buick Lucerne CXL 3.8 40k 5w30
Re: When to Replace Battery? [Re: TheLoneRanger] #4831509 08/05/18 01:12 AM
Joined: Feb 2013
Posts: 11,722
Nick1994 Offline
Offline
Joined: Feb 2013
Posts: 11,722
Is it your car charging it to 12.4V or a high quality battery charger?

Could be the car not charging it enough.


2015 Hyundai Sonata 2.4L 102k STP Synthetic HM 10w30 & OEM
2000 Toyota Camry 2.2L 234k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 149k Mobil 1 HM 10w40 & Fram Ultra
Re: When to Replace Battery? [Re: TheLoneRanger] #4831523 08/05/18 02:06 AM
Joined: Dec 2016
Posts: 151
P
Panos Offline
Offline
P
Joined: Dec 2016
Posts: 151
The battery in my car right now showed 12.6 volts fully charged the day I have purchased it open circuit. After about 3 years it showed 12.2 volts after standing for a night in my car.6 and a half years later, it still works.I maintain it now and then using a ctek charger. Batteries are quite mysterious sometimes.


Ford Fiesta 1.6 '05 - Motul specific 913D/Motul Gear 300 180K+ Kms
Kawasaki Ninja 250R '08 - Shell Advance Ultra 4T 10w40 75K+ Kms
Honda CBR600F pc41 '14 - Motul 7100 10w30 25K+ Kms
Re: When to Replace Battery? [Re: E150GT] #4831528 08/05/18 03:52 AM
Joined: Mar 2015
Posts: 6,275
B
billt460 Offline
Offline
B
Joined: Mar 2015
Posts: 6,275
Originally Posted By: E150GT
I start looking for replacement and testing the battery when i hear the engine start to crank slower and charging seems to do nothing. I know the end is near. I don't want to be stranded somewhere.


While that all sounds good, in the Arizona heat most of the time you are not afforded that luxury. Batteries will go dead all but instantly, and without warning. I've been lucky. All of mine have managed to die at home in the garage.... Except one. I got in my truck one morning, and the engine spun like a top, and fired right up. The volt meter showed nothing out of the ordinary. I then drove 3 miles to the store, got out and went inside. When I returned 10 minutes later NOTHING. The dome light wouldn't even go on. I thought someone stole the battery.

I was able to walk home, get my other car, and jump start it..... Barely. I got it back home, and parked it in the driveway, and went and got another battery. It tested dead at the store. They gave me a new one for no charge under warranty. It was 2 years old. Typical for a Arizona battery. 2 Summers and that's it.

Out here batteries don't give you signals or warnings. They just drop dead. Like a retiree on a golf course.

Re: When to Replace Battery? [Re: TheLoneRanger] #4831537 08/05/18 05:24 AM
Joined: Apr 2005
Posts: 713
K
knerml Offline
Offline
K
Joined: Apr 2005
Posts: 713
It really depends on the vehicle, its tolerance of low voltage, and battery drain of electronics while off.


2015 Hyundai Elantra Sport 2.0 GDI Mobil 1 5W30 & OEM/Mann W811/80 Filter
2018 Hyundai Santa Fe Sport AWD 2.0T Castrol Edge 5W40 & OEM/Mann W811/80 Filter
Re: When to Replace Battery? [Re: TheLoneRanger] #4831543 08/05/18 05:55 AM
Joined: Dec 2011
Posts: 6,572
rooflessVW Offline
Offline
Joined: Dec 2011
Posts: 6,572
One slow crank and I'm looking for a problem. If the battery load tests marginal out it comes.


"Zed's dead baby, Zed's dead."
Re: When to Replace Battery? [Re: TheLoneRanger] #4831550 08/05/18 06:45 AM
Joined: Nov 2011
Posts: 1,778
A
Audios Offline
Offline
A
Joined: Nov 2011
Posts: 1,778
Average life is normally 4-5 years on a lead acid, but ive had some last much longer. I also have a 10 year old Interstate in my older Audi A4 that shows 11.8 but still cranks it over no problem. Its a lower compression turbo 4 cylinder so that might be aiding its longevity.


2002 VW Golf TDI-T5 10/30
2007 Mercedes GL320 CDI- M1 0/30 ESP
2005 BMW M3 BMW Twin Power 10/60
2003 BMW M5-Fuchs 5/40
1998 BMW M3/4/5 Fuchs 5/40
Re: When to Replace Battery? [Re: rooflessVW] #4831572 08/05/18 07:32 AM
Joined: Jun 2003
Posts: 34,823
E
eljefino Offline
Offline
E
Joined: Jun 2003
Posts: 34,823
Originally Posted By: rooflessVW
One slow crank and I'm looking for a problem. If the battery load tests marginal out it comes.


If you have a gear reduction starter it really doesn't take much to kick things over, so a battery that cranks slow is pretty far along on its death curve.

I've read that if the voltage dips below 9 during cranking, a battery is toast. One would need a logging/ graphing meter to get this accurately, but watching the dash light bulbs dim a lot with an experienced eye can diagnose this.

Re: When to Replace Battery? [Re: eljefino] #4831590 08/05/18 07:55 AM
Joined: Aug 2010
Posts: 6,723
K
Kira Offline
Offline
K
Joined: Aug 2010
Posts: 6,723
Sis' battery was on month #35 of a 36 month free replacement period when she called.

Turn the key and it'd drop to 3 volts.

"Go get a battery" was all the AutoZone man said to the employee.

Re: When to Replace Battery? [Re: TheLoneRanger] #4831596 08/05/18 08:02 AM
Joined: May 2005
Posts: 539
S
sprite1741 Offline
Offline
S
Joined: May 2005
Posts: 539
If you think it's time just change it. Not worth getting stuck somewhere. I had a 3.5 year old O'Reilly Super start that just quit on me a week ago. Replaced it with a Korean made Centennial from Battery Systems for $97. I had a Centannial in my Dodge that went 6 years, I think I paid $52 for that one years ago. O'Reilly, AZ, Napa are around $140 now. Overpriced money makers for the chain stores. They can keep them.


2005 Grand Prix GXP 5.3L Supertech Synthetic Dexos 5w30 Fram Ultra 3506
1986 Dodge Lancer 2.2L Turbo, Supertech Synthetic 10w30 Fram Ultra 3614
Re: When to Replace Battery? [Re: TheLoneRanger] #4831619 08/05/18 08:18 AM
Joined: Jul 2012
Posts: 2,557
J
john_pifer Offline
Offline
J
Joined: Jul 2012
Posts: 2,557
I bought my WRX new in March 2016. Battery has already died a few times on me.

Apparently Subaru puts some notoriously bad batteries in their cars, and possibly the alternators don't charge the batteries well enough.


07 Tacoma V6 - M1 EP 5W-30, Fram Ultra, 10K OCIs, 212K
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250, Klotz, Rotella

Re: When to Replace Battery? [Re: Wolf359] #4831627 08/05/18 08:25 AM
Joined: Nov 2006
Posts: 22,404
T
Trav Offline
Offline
T
Joined: Nov 2006
Posts: 22,404
Originally Posted By: Wolf359
There are many battery state of charge charts out there like this one:

https://modernsurvivalblog.com/alternative-energy/battery-state-of-charge-chart/

The temperature of the battery is also important as the voltage will be lower when it's colder.

Basically you replace a battery when it fails a load test. Most auto parts stores will do a free load test for you. It's possible to get a 12+ voltage reading but once you put a load on it, you get no current.

I suppose you could just buy one too. Maybe one of these two?

https://www.amazon.com/Schumacher-BT-100-Battery-Load-Tester/dp/B000AMBOI0

https://www.amazon.com/Bastex-Battery-Insulated-Carrying-Automotive/dp/B01N75BLH5


Be cautious using those types of testers, I have seen lots of batteries did shortly after using them, of course the battery was on the edge anyway but those thing will put the final nail in the coffin.
Use a tester for CCA if its down around 60% of its original capacity you probably should start looking for a battery.

https://www.amazon.com/Clore-Automotive-...76C0A1089EF5HAM


ASE L1, Master. Deutsch Meisterbrief.
Page 1 of 3 1 2 3
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™