Thanks Chuck. Do you think the Rolls or Surette are longer lasting
than the seven seasons I've gotten from mine?

Hard to say what a specific battery will do, but I believe my Rolls batteries
have ten year warranties, with no prorating for the first seven. Compare that
to a more common batttery warranty of 24-36 months, often pro-rated after 12,
and the manufacturer certainly has a lot of faith in them.

When I was in the auto business, I dabbled in some primitive electric cars. A
local coop would fit electric motors and goo gobs of batteries into Geo Metros,
kit cars, etc- and then I'd help them sell them to the public. The battery the
electric car people always used was a Rolls, and those guys lived, breathed,
and all but worshipped batteries.

Another thought is that I may get another bought after a few more
years. No sense in buying twenty-year batteries in that case. Hell,
the new owner of my boat, if and when, may just take it out and
capsize it!

So don't buy a 20-year battery, but if it were my boat and the garden variety
batteries had reached the ripe old age of seven years, I'd figure they had
earned a dignified retirement and put in something likely to be more reliable
for next season.