Quote:
Originally Posted by aschen
Just replaced the 9 yo battery in my cayman pre-emptively. Usually I let them die. Only get about 3 years out of my daily drivers that bake in the sun outside and have battery in the hot engine bay.
I think its cheaper/easier to just keep a 49$ lithium jump start pack in the trunk and run em til they die at least for cars old enough to have manual trunk pops. Bonus if you get the lithum pack with built in inflator since slow leaks get me more than batteries.
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Good point. I'm skeptical of blanket 'industry standards', I think the car's environment is the key to battery life. High temps kill batteries fast.
Here in pacific northwest our car's kirkland batteries last about 8 years? The pair of batteries on my truck are 11 years old. Watch the charged voltage it drops as battery ages, if battery tender will put it back to over 12.4v (after being used for a start) then I'm keeping the battery.
And I replace both if one battery degrades since they're wired parallel.