Thanks for the replies. Did a search and a Lifeline dealer is within a reasonable drive.
On Lifeline's website, found the linked manual. Very quickly skimmed thru and on the last page, p 38 found a graph comparing cycles to DOD.
Interesting--
At 50% DOD---1000 cycles
At 80% DOD---550 cycles
Lifeline ManualCurious as what a Gr 31 Marine will cost?
I will have to weigh cost per Ah, cost per cycle, ease of replacement, warranty, and hate to say this, cost of replacement due theft. Boats and associated equipment are prime and, despite precautions, are fairly easy targets for crooks. (Florida fishing areas seem to be a 'hot-bed' for boats, outboards, trailers, generators, and ...Yeti/Pelican/Engel coolers dissapearing.)
I want to discuss proper charging in a separate posting and after studing East Penn's Tech Manual. I know that a proper charger is mandated. First problem is a 'Marine', i.e. waterproof and sealed chager is required (open boat). I'm a little fuzzy after looking at so much info, but it seems like 15 Amps per battery is the largest I've seen.
Fred
