Meal. I need a new car battery for my B4 Bj 93. I know but nit which I should get. On sound system I don’t have much in the car radio: JVC 4*40Watt +CD Changer Boxes: 2-compo Phonocar 120Watt (front ) The still pure 4 channel power amplifier 600Watt so I want to listen to music for more than 10 minutes when the car is off, without which I need to get started again Which battery is so recommended? should not blow up the wallet … gruss un d thank you already once Asgard