Those guys are nuts! Chargine an Optima at 100 amps for ANY lenght of time is sure way to kill them. The should be charged slow, preferrably at 2 amps, for about 12 hours or so. We carried Optimas up 'til last year (Hoffman decided we needed the "diehard Platinum" instead, dumb move if you ask me) and the Optima catalog specifical states not to fast charge an Optima battery. I'll stick with my good old Traveller battery charger set on 2 amp trickle, thank you.
