i was told a capa was just to give an extra kick for a bit and thats it, otherwise waste of money. yellow top battery is A++ im running a hard system, and before i had the battery, my hids would dim, so would all the other lighting in my car. i recently went to the drive thru movies, watched sex drive and saw5, had my system thumping loud and my car didnt die. i was parked right next to another camry and her car died at least 4times. im running a jl audio 1000/1 and 300/4 amps with 0guage wiring :)