Hey, I have recently been having problems starting my car and i have a high amp altenator and yellow top battery. The interstate truck guy said the yellow top is mainly for secondary backup battery and for starting and regular use i should use a red top. Thing is i already spent money on my yellow top few months ago. Do you think its worth wiring both batterys up? I looked with a little work you could put both batterys parellel next to each other in the battery tray. Then i would have enough power to run my stereo system finally. Other choice would to have maybe the red top under the hood and the yellow top in the trunk but i dont feel like wiring it all up. If they both sit under the hood next to each other i just have to run a wire from positive to positive and then ground to chassy.