Truck Battery

These batteries supply electrical energy to a motor vehicle. They are also known as SLI battery (starting-lighting-ignition). Main purpose of such batteries is to start the engine with supply of very high current for just few seconds. After engine starts and gets sufficient speed, the alternator/dynamo system of the vehicle generates electric power to charge the battery back and supply power to other accessories.

The SLI battery supplies extra power when the vehicle's electrical requirements exceed the supply from the charging system. It acts as a stabilizer, smoothing out potentially damaging voltage spikes. SLI batteries use six series-connected cells to provide a nominal 12 volt system (in most passenger vehicles and light trucks). Some multi axel heavy trucks, earth-moving equipment use 24 Volt system i.e. 2 batteries of 12 Volt connected in series.

Battery electric vehicles are powered by a high-voltage electric vehicle battery, but they generally have an automotive battery as well, so that they can use standard automotive accessories which are designed to run on 12 V.