Join Date: Nov 1999
Location: Central California, USA
We have a fleet on our farm, we see about 3 to 5 years on a pickup use. Vibration hurts them a lot shaking pieces of the plates to the bottom until they build up and short the plates at the bottom. HD batteries have shorter plates for more room for sediment.
You can kill a fairly new battery by letting it sit dead, or with a drain. A dead battery will build up sulfite, or sulfate? deposits on the plates when it's sitting discharged. That will prevent the plates from functioning properly.When discharged, the acid turns more to water and it can even freeze.
The most I've seen is a life of about 7 to 8 years on my dads old Cadillac, the nice floaty ride took it easy on the battery, and it got used about once a week, the rest of the time it sat.
The best thing you can do for your battery is keep it charged and disconnect it if it will sit.
The older I get, the faster I was!