By a gel cell. I'm droppin in an Optima Yellow top some time in the next week. Had one in my Porsche and it was great. I could run my stereo (multiple amps, subs, components, etc.) for couple of hours and it still started fine. With 850 CCA and an alternator with 140amps rechraging it, it was a great system.
If I may hijack the thread for a minute, anyone know where to get a good alternator upgrade? Maybe 120-140amp?