DescriptionA BMW battery is a rechargeable battery that provides electrical energy to your auto.
It is also known as an SLI battery (abbreviation of starting-lighting-ignition) and its main goal is to start the BMW engine.
The alternator supplies power for the auto once the engine is operating.
Normally, starting discharges less than three per cent of the battery capacity. SLI batteries are designed to release a high outburst of current, measured in amperes, and then be quickly recharged.
They are not designed for deep discharge, as well as a total discharge can decrease the battery’s lifespan.