The battery Bosch S40 09 is a classic lead-acid battery known for its reliability and relatively long lifespan. Its capacity is 74 Ah, and the maximum starting current is 680 amperes. The pole layout 1 means that the positive pole (+) is located on the left side of the battery, looking from the terminal side. This battery has a B13 mounting zone, which means that the lower mounting bracket is located at the bottom of the battery on each side. This is the standard mounting method in almost all European cars.