Curly's Under Fender Battery BoxCURLY'S INC Under Fender Battery Box Hidden Power for Your Bagger Build Introducing a clean, stealthy solution for mounting your second batterythe Under Fender Battery Box from Insane Asylum Motorsports. Designed to tuck neatly under your stretched rear fender, this box gives you a secure and discreet way to power your amps and audio system without cluttering your bags or side compartments. Key Features: Fits Most Touring Batteries Holds any battery