Harry Krause wrote:
Last year I bought a Vector battery charger, the blue "marine" model
that has 2/10/20/35 amp charge rates, and I've used it a couple of times
to charge my tractor battery, car battery and boat batteries. It works
well as a charger at the 2/10/20 rates. Never tried the 35 amp rate.

But the charger also "reconditions" batteries, or so the advertising and
manual say, using a 24-hour cycle to desulfate battery plates. I've
never used this feature, but I loaned the charger to a buddy and he
reports that it actually revived two batteries he was about to toss. I
don't have any other details.

My one gripe about the charger is that its LED readouts are virtually
impossible to read outdoors, even in indirect light.

Is this the model your 'buddy' Larry from S. Carolina swears by?
I have an old charger kicking around but will be buying a deep
discharge marine battery soon and was wondering if I should just go
with the old unit or upgrade to a 'smart charger'.