DW had a little trouble starting the car (2015 Forester) on some cold days so I got the battery checked at AutoZone. It rang up 12.7V. The guys commented the battery is no good. OEM Forester battery is really smallest they could put, with just CCA of 390. So I am not actually surprised to see volta…

Yeah, 12.7 volts is perfectly fine but you need to know CCA. I check mine a couple times a year to see when they are getting weaker. 600 plus CCA are really pretty standard, at least in a Delco battery. On my three year old battery, I lost a little CCA over the past 6 months so I’ll be watching i…

If your 2015 Subaru was built in 2014, the battery is now well over 4yrs old, so I’m not surprised it tested bad That said, if the oem battery isn’t an agm, you can stick with a regular group 35. The agm batteries typically cost at least twice as much, but they don’t last twice as long, not in my …

@shadowfax , cold is NYC cold. We have had lowest 24F this year when DW had an issue starting the vehicle. But nowadays, its upper 30s in my neighborhood many mornings. I am not too sure of the healthy voltage. I thought it should be above 13V. Hence I took it to AutoZone to get it checked. @bing H…

[image] Noelm: why did AutoZone’s meter recommended ‘Replace the battery’? That is all I would need to know . I don’t care about testing a battery for anything . I just want the silly vehicle to start.

[image] Noelm: I thought it should be above 13V. It should be in the 13/14v range when the car is running, but when the car is off anything above 12.6-ish is good, voltagewise. Keep in mind that as others have said you can have good voltage and still have a bad battery, but any time someone o…

@Tester Where can I get tested like this one? I could try my local mechanic but before I go to him, is there any other store, other than AutoZone that would test?

Walmart gave me that kind of readout on my battery a couple years ago. It seems to be a widely used device.

Or you can buy your own less sophisticated tester for under $100. AZ testing kind of reminds me of every battery must be replaced like AAMCO transmissions where every transmission must come out.

[image] bing: AZ testing kind of reminds me of every battery must be replaced like AAMCO If their test equipment is faulty then they would have a lot unnecessary warranty claims.

Should I replace the battery? AGM, Worth the cost?

Maintenance/Repairs

Tester November 30, 2018, 5:46pm 12

Nobody load tests battery’s anymore. It’s an old/antiquated method to determine the actual condition of a battery.

Battery’s are now tested using a conductance tester to measure CCA’s.

Here’s the reading I got when I tested my own battery with a conductance tester.

Tester

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Should I replace the battery? AGM, Worth the cost?

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