The car had hesitation after some recent decent (15+ miles each way) driving, so I bought the battery tester to check things out. I did test it with three other batteries: two traditional SLA, and one proper AGM. All were rated to their expected voltage (12V) and expected CCA. The BS battery is the only one under a year old (by far...)
For all other cars, the results were as expected; the car barely driven with some start hesitation had a "battery good, please charge", and the other batteries were "battery good".
Hesitation on a 8 month old battery makes me suspect the battery. I have a DC power splitter in my car with a voltmeter, as does my radar detector, and I regularly see 14.2V on both while engine/alternator are running. Auto start/stop makes this way more wild (12.6 down to 12 before engine starts and up to 14.8), but I have auto start/stop turned off.
I'm inclined to suspect the battery itself unless there's a larger parasitic draw in the BS, of which no source is obvious.
For all other cars, the results were as expected; the car barely driven with some start hesitation had a "battery good, please charge", and the other batteries were "battery good".
Hesitation on a 8 month old battery makes me suspect the battery. I have a DC power splitter in my car with a voltmeter, as does my radar detector, and I regularly see 14.2V on both while engine/alternator are running. Auto start/stop makes this way more wild (12.6 down to 12 before engine starts and up to 14.8), but I have auto start/stop turned off.
I'm inclined to suspect the battery itself unless there's a larger parasitic draw in the BS, of which no source is obvious.
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