I’ve had a subwoofer installed in my car about 4 months ago, and it’s killed my battery twice now leaving me to having to buy another. So I was wondering what brand battery or what I could do to help prevent that, and yes I have a killswitch so that the amplifier isn’t consistently staying powered. It’s also tied into the fuel pump fuse which also cuts power when the car is turned off

 

This will be better served in the audio forum as opposed to here. I will rename this accordingly.