Fwiw, I have an EverStart Platinum in group size 24F that is over a year old and it will test higher than the label listed CCA.
Now about another battery.... three weeks ago I had two failed starts (a week apart) with a 4 and 1/2 year old AZ Gold battery. I removed it from the car and charged it; and then tested it with my battery tester. It showed bad and less than 200 CCA.
I took that battery inside to WM and went to select another battery from the shelf. I proceeded on to the WM auto service desk for purchase and to exchange my old one for core; when the attendent said they could test my old one. I was all but certain I needed the new battery so was going to decline the offer but then I thought, why not see what it shows? Their new looking fancy Midtronics battery tester showed my old battery was "good" at ~550+ CCA. I was very surprised. I put the new battery back on shelf and left with my old battery and it just so happened I drove by an Advanced Auto store within a few blocks so I stopped there and had them to test it. They wanted to put it on their charger first so I left for about an hour and returned. When I returned, their test said it was a bad battery.
I then purchased the new battery as originally planned and the car has started perfect now for three weeks. The comments above about a WM battery having to test less than 50% of CCA to get warranty replacement now have me wondering considering how my test went there three weeks ago. Their test showed well above 50% on the bad battery.
Now about another battery.... three weeks ago I had two failed starts (a week apart) with a 4 and 1/2 year old AZ Gold battery. I removed it from the car and charged it; and then tested it with my battery tester. It showed bad and less than 200 CCA.
I took that battery inside to WM and went to select another battery from the shelf. I proceeded on to the WM auto service desk for purchase and to exchange my old one for core; when the attendent said they could test my old one. I was all but certain I needed the new battery so was going to decline the offer but then I thought, why not see what it shows? Their new looking fancy Midtronics battery tester showed my old battery was "good" at ~550+ CCA. I was very surprised. I put the new battery back on shelf and left with my old battery and it just so happened I drove by an Advanced Auto store within a few blocks so I stopped there and had them to test it. They wanted to put it on their charger first so I left for about an hour and returned. When I returned, their test said it was a bad battery.
I then purchased the new battery as originally planned and the car has started perfect now for three weeks. The comments above about a WM battery having to test less than 50% of CCA to get warranty replacement now have me wondering considering how my test went there three weeks ago. Their test showed well above 50% on the bad battery.