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At what % CCA do you replace your batteries? #4622923
01/03/18 05:26 PM
01/03/18 05:26 PM
Joined: Oct 2015
Posts: 455
MN
TmanP Offline OP
TmanP  Offline OP

Joined: Oct 2015
Posts: 455
MN
Of course, some CCA loss is normal over time. But at what point do you replace the battery?
The Sienna battery tested at 501 out of 700 CCA, a loss of 29.5%. It's a 4 year old Autocraft gold.
And the Buick battery tested at 499 out of 660 CCA, a loss of 24.4%. It's a 2.5 year old AC Delco Silver.
(Both are JCI batteries.)
Would you guys replace them or wait?


2012 Toyota Camry 2.5 30,000 mi
2015 Chevy Silverado LT Z71 5.3 V8 30,000 mi
2010 Toyota Sienna 3.5 V6 150,000 mi
Re: At what % CCA do you replace your batteries? [Re: TmanP] #4622932
01/03/18 05:37 PM
01/03/18 05:37 PM
Joined: Sep 2015
Posts: 6,171
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline

Joined: Sep 2015
Posts: 6,171
Kalifornia Kollective
How do the vehicles act when cranking? Yes, they are loosing starting power, but do they have enough to spin a cold motor well?

I've taken 1,000 CCA batteries down to just above 50% and they would still start. But, at that point it was getting sketchy ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: At what % CCA do you replace your batteries? [Re: TmanP] #4622934
01/03/18 05:38 PM
01/03/18 05:38 PM
Joined: Aug 2003
Posts: 11,227
Buffalo, NY
JTK Offline
JTK  Offline

Joined: Aug 2003
Posts: 11,227
Buffalo, NY
The OEM battery in my 2016 Subaru Forester says 390 CCA on the sticker!


2017 Ram 1500 4x4, 3.6L. 2016 Nissan Quest SV (Babe magnet IV)
Re: At what % CCA do you replace your batteries? [Re: TmanP] #4622939
01/03/18 05:51 PM
01/03/18 05:51 PM
Joined: Mar 2014
Posts: 3,794
NJ
Leo99 Offline
Leo99  Offline

Joined: Mar 2014
Posts: 3,794
NJ
I have no idea about CCA.

I change the battery out when the car doesn't start with the same gusto as usual.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 370,000 miles
2015 Camry 70,000 miles
Re: At what % CCA do you replace your batteries? [Re: TmanP] #4622942
01/03/18 05:53 PM
01/03/18 05:53 PM
Joined: Nov 2013
Posts: 2,013
Chicago, IL
EdwardC Offline
EdwardC  Offline

Joined: Nov 2013
Posts: 2,013
Chicago, IL
I've actually never gotten a battery tested for replacement. I usually replace them when they get slow to crank, or don't crank at all. I mentally factor in the age of the battery as well. If the battery is relatively new, I'll put it on the battery tender a while to see if it improves.

Re: At what % CCA do you replace your batteries? [Re: TmanP] #4622954
01/03/18 06:06 PM
01/03/18 06:06 PM
Joined: Jan 2008
Posts: 11,257
OH
SatinSilver Offline
SatinSilver  Offline

Joined: Jan 2008
Posts: 11,257
OH
Can you top them with some dist. water? I would do that if possible. Then take them both to Walmart TLE for their NOCO treatment which runs $3.50/battery. They will install the felt washers and some nice thick red grease.

Then maybe give them a good charge.

I have a 500 CCA battery that is five years old + and tested at 455 CCA. So less than 10% reduction and has never been charged.

Re: At what % CCA do you replace your batteries? [Re: TmanP] #4622955
01/03/18 06:08 PM
01/03/18 06:08 PM
Joined: Apr 2016
Posts: 813
Specific Ocean
Kibitoshin Offline
Kibitoshin  Offline

Joined: Apr 2016
Posts: 813
Specific Ocean
The Odyssey AGM (Diehard Plat) in my Silverado tested 835CCA @ 12.2v resting overnight. Made in Nov 2013. ~1300CCA @ 13.06v when purchased brand new.

Started looking for a new battery. Had times where it struggled to start.

Last edited by Kibitoshin; 01/03/18 06:08 PM.

Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L
02 Chevy Silverado C1500 V8 5.3L
Re: At what % CCA do you replace your batteries? [Re: TmanP] #4622962
01/03/18 06:17 PM
01/03/18 06:17 PM
Joined: Mar 2008
Posts: 6,377
Michigan
ZZman Offline
ZZman  Offline

Joined: Mar 2008
Posts: 6,377
Michigan
No idea on CCA. I change it when AutoZone test says it is bad.


2003 Mercury Grand Marquis. PP HM 5w-30 and Fram TG
2008 Sebring Hardtop convertible. PP HM 5w-30 and Fram Ultra
2006 Kawasaki Vulcan 900 LT. Motul 7100 10w-40 and K&N
Re: At what % CCA do you replace your batteries? [Re: ZZman] #4622968
01/03/18 06:20 PM
01/03/18 06:20 PM
Joined: Jan 2008
Posts: 11,257
OH
SatinSilver Offline
SatinSilver  Offline

Joined: Jan 2008
Posts: 11,257
OH
Originally Posted By: ZZman
No idea on CCA. I change it when AutoZone test says it is bad.


They always say it's bad it seems. Just like in my example above. They asked for the CCA and it came back at 455/500. I asked one of the most knowledgeable guys on here about it and he said for less than 10% it would be a waste to replace it.

Re: At what % CCA do you replace your batteries? [Re: TmanP] #4623003
01/03/18 06:57 PM
01/03/18 06:57 PM
Joined: Jun 2003
Posts: 34,066
ME
eljefino Offline
eljefino  Offline

Joined: Jun 2003
Posts: 34,066
ME
If you ask Midtronics (as approved for battery warranties), <50% is the replace zone and <60% is a warning.

Re: At what % CCA do you replace your batteries? [Re: TmanP] #4623015
01/03/18 07:10 PM
01/03/18 07:10 PM
Joined: Dec 2016
Posts: 7,991
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,991
Waco, TX
Originally Posted By: TmanP

Would you guys replace them or wait?


I always wait until they get "slow" - usually, there's lot of "warning"'

I have only EVER had ONE battery that just up & failed 100%
(started perfectly one day, next day = NOTHING)
and it was a MAXX-1 Group 65 in my F150.
I had to jump it off from my Harley to get to the store.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: At what % CCA do you replace your batteries? [Re: TmanP] #4623034
01/03/18 07:27 PM
01/03/18 07:27 PM
Joined: Dec 2002
Posts: 42,624
New Jersey
JHZR2 Offline
Global Moderator
JHZR2  Offline
Global Moderator

Joined: Dec 2002
Posts: 42,624
New Jersey
This one shows no signs of weakness, yet I get this.




Not sure what to make of it. Lost capacity If get but it cranks strong and easy even in 10F weather which is the coldest we've seen. I do have a spare battery in reserve.

Re: At what % CCA do you replace your batteries? [Re: TmanP] #4623083
01/03/18 08:28 PM
01/03/18 08:28 PM
Joined: Dec 2017
Posts: 427
California
VeryNoisyPoet Offline
VeryNoisyPoet  Offline

Joined: Dec 2017
Posts: 427
California
I usually end up replacing batteries when I begin noticing a combo of capacity drop, slower cranking, or poor charge holding. My car is very reliable and consistent to start, so any weakening is obvious, such as taking a full extra compression stroke to catch in mild weather. But capacity drop, self discharge, or not taking a charge well is the more common red flag, even if it still cranks strong. I don't want to find out the hard way there's only 30 minutes reserve capacity instead of 120.


1998 V70 GLT / 202k miles [10w-30 Valvoline Syn w/ Maxlife Tech + Mann W917 filter]

"Use yah blinkah!"

"Be nice. The alternative involves an air horn and 7000 lumens of high beam."
Re: At what % CCA do you replace your batteries? [Re: TmanP] #4623088
01/03/18 08:34 PM
01/03/18 08:34 PM
Joined: Dec 2012
Posts: 1,486
New Mexico, USA
jimbrewer Offline
jimbrewer  Offline

Joined: Dec 2012
Posts: 1,486
New Mexico, USA
I think Ford condemns the battery when it loses 20% of original CCA. Whether that's a real rule of thumb or meretricious nonsense, I have no idea.

The rationale is that it's hard on the alternator, not that the battery is weak, per se. That's plausible.

Re: At what % CCA do you replace your batteries? [Re: TmanP] #4623105
01/03/18 08:47 PM
01/03/18 08:47 PM
Joined: Oct 2014
Posts: 2,741
San Antonio, TX
Nyogtha Offline
Nyogtha  Offline

Joined: Oct 2014
Posts: 2,741
San Antonio, TX
I replaced the factory flooded Group 96R battery in my wife's Mustang last month. It was down to about 60% of original rated CCA, and had been in service 7 years. The "eye" was dark. It still cranked her engine over fine, but I no longer trusted it and Pep Boys had an incredible sale + stackable rebate over Black Friday. I upgraded her car to a AGM Group 48 Bosch battery. Glad I did this when I did, before the current extended cold snap.

Last edited by Nyogtha; 01/03/18 08:48 PM.

"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen
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