I know that I will be asking some stupid questions about batteries but I am kind new to the whole thing. Right now I have a stock batt, a 12 kicker l7, a 3 farad cap and running about 900 watts rms. I want to upgrade to 2 12's, a bigger ported box and a RF t1500bd. I was wondering if I should get a large farad cap or should I go with a second battery. If I go with a second batt do I have to charge it? Or should I run another wire from my alt to it. If I do that will it drain my alt? I only have a stock alt because no one makes a Ho one. By the way it's a 2007 KIA optima 4 cylinder if anyone knows of any alts. Any support would be greatly appreciated.