Originally Posted by Oscarguitar
Get an AGM battery and forget about it. Odyssey make a very good battery. Find out want CCA you need and work from there
I too bought an AGM battery for our new boat, it is a banner battery, Austrian and very reliable.
Basically the AGM batteries are used in cars that have stop start technology, I was told by a good friend in the trade that these are ideal for marine applications as they will still work when the voltage drops.
Been great so far