Autometer Battery Extender - 12V / 3A (BEX-3000) YMM_2005_2007_Mercury_Mariner_I allowing for a secure fit

allowing for a secure fit on the BMW E9X M3 bumper

with reduced play and more direct control

leak-free connection during installation

1979 BMW 6 Series 630 633 (E24)

Simply hang it from your vehicle's rearview mirror

Autometer Battery Extender - 12V / 3A (BEX-3000) YMM_2005_2007_Mercury_Mariner_I allowing for a secure fit12V 3A Battery Extender by Autometer These Battery Extenders from AutoMeter are designed to maximize the life of a 12V battery. They charge a battery at a 3 amp rate until it is fully charged, and then maintain your battery's charge so that it is always ready to go! Features Battery extenders keep your battery at full charge on a continuous basis. Batteries not kept at full charge become sulfated. Maintain stored batteries at full charge to maximize