2008-2013 BMW 135i | Convertible N54 Engine(E88), Convertible N55 Engine(E88), Convertible(E88), Coupe N54 Engine(E82), Coupe N55 Engine(E82), Coupe(E82)
This Advanced Battery Charging System can help you extend the life of your battery. Simply plug the 4-amp charger into a standard 115-VAC wall outlet and connect the alligator clips to your terminals under the hood. The device's on-board microchip monitors and regulate the charge- virtually eliminating sulfation.
This product is now switchable between AGM (Lead Acid/Standard) batteries and Lithium-Ion batteries (as found in the F80 M3 and F82/F83 M4).