The battery Bosch S40 21 is a classic lead-acid battery known for its reliability and relatively long lifespan. Its capacity is 45 Ah, and the maximum starting current is 330 amperes. The pole layout 0 means that the positive pole (+) is located on the right side of the battery, looking from the terminal side. This battery does not have a lower mounting bracket (B0), which is characteristic of many Asian cars. Make sure this is the correct type of mounting for your vehicle.