Im in need of a second battery for system. I've done the big 3 and installed the largest agm dry cell battery that i can under the hood. However still when the bass hits the lights will go dim. Im running 1200 rms drawing 90amps max on two SA-12's. My trucks alternator is 136amps. Im wondering about a Kinetik or Optima battery and what size? Also, will my trucks stock alternator be able to handle the two batterys? the truck is a 2006 Ram Hemi btw..