Mike
IF it helps at all, I have a NORCO Genius 10 (???) I have had an a wet cell 6V in the 32 for over a year now, great charger AND I did have to use it to recharge my 6V Red Top Optima once, worked fantastic. I also bought a few of NAPA's 1.5V chargers and two 3.0V chargers they run on sale, both switchable from 6V to 12V and they work well on my wet cell's BUT I have not used it on my Optima. It seem to me NAPA runs them on sale for like $20ish for the 1.5 and $28ish for the 3.0. Good luck