Which battery, red or yellow???

No alt = yellow. W/ alt, use red.
I use one yellow Optima, no alt, no problem. 440, 12.5:1, small Chrysler starter, two classes each day, use a Black & Decker smart charger.
Brian

If the ones that are 12 years old are still alive and kicking, I'd keep them.

I had a redtop last over 10 years of daily driving, sitting outside over the winter, etc., and now it is still going as winch power. They started making them in mexico a few years ago and quality has suffered.

But as the others have stated, yellow top for no alt.

Thanks for the inputs. I currently do run an alt (140amp) but I still charge between rounds. Up until a yr ago I could get the battery back to 100% between rounds but not anymore. They have never failed me but I don't want to give them the chance. I have always used a smart charger in fact I'm on my second one now. I have had as many as 7 Optimas in use at a time, 2 in racecar, 3 in motor home and 2 in the bass boat. The only one I ever had any problem with is the starting battery in the MH. I had to replace it twice after a yr of use. After the second replacement the dealer told me he wouldn't replace it again and that I must have a problem in my vehicle. I did some checking and there was a minute draw on the battery and since I could not find the source of the draw I started unhooking the battery after every use. It is now on its 3rd yr and going strong. Again, thanks for the inputs I've ordered 2 red tops to go into the race car.

I use a red top for the ignition and a yellow top for everything else.