Pulse battery maintainer
I kept my batteries hooked up to a pulse battery maintainer charger. The unit is an AC Delco and first off when on maintainance it de-sulphates and then goes into standby where it just tops up at a trickle if the battery drops. Appears to do the job just fine. My Tourmaster has two big Cat batteries, I thought one was toast until I ran the de-sulphator. Brought it right back to life.
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