90chevy396
Well-known member
I am running the same group 31 I had in my old boat and I put it on a trickle charger once a year and it is 8 years old as long as you use a DEKA or your preferred top quality battery with a large reserve capacity and charge them once a year with a 24 hr charge with a trickle charger they will extend their life because the batteries never get fully charged by the alternator from a single starter use