I've also got an Optima red top in mine. I'm having charging issues right now too.
I charge it up fully. After a few days of driving around and maybe 10-15 starts, it won't crank enough to start up and I have to give it a boost. This is a warranty replacement battery Optima gave me this Spring because my original from them died and they covered it.
I'm running a one-wire alternator and also have an electric fan and power amp running to the +.
I was thinking of installing a negative cut off switch, assuming I must be draining the battery somehow. Does this make any sense?
