SPL Blazer
10+ year member
SPL Event Promoter
X2Buy a decent battery instead. Doesn't matter if the car is yours or not...
If your running a power wire to the amp then what difference does it make if you put a battery back there too? Your already going to have to drill a hole for the power wire, might as well add the small battery in the back while your at it. Just run your amp off the rear battery.