BMW Genuine Factory OEM 82110406881 Advanced Battery Charging System
Designed to fully charge and maintain your battery at the proper storage voltage. Designed to fully charge and maintain a battery at a proper storage voltage without the damaging effects caused by trickle chargers. The new BTP micro-chip technology applies the correct peak charge, and then automatically maintains the battery at the perfect float voltage which virtually eliminates battery destroying sulfation!Complete 3-Step Constant Current Charging Program:Bulk charge, Absorption charge, and Float charge.