I am running 3 10" Kicker CompVRs so I was gonna put in a cap and the guy at the audio place told me to get a YellowTop battery which would stop the dimming, but I got one installed and it helped but it didn't completely stop it. My question is whether I should get a cap or put my old battery in and mount the yellowtop in the trunk so i would be running 2 batteries? Which one would be better?