How long does it take to fully charge a car battery while the engine is running?

[StNora]

It takes about 20 minutes of engine operation to fully charge a car battery, provided that the battery is in good condition. The battery is a crucial component in a vehicle. When the engine is not running, the battery supplies power to all the electrical devices in the car and is also responsible for starting the engine. Once the engine is started, the alternator takes over the role of powering all the electrical devices and simultaneously charges the battery. An engine is a machine that converts other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, electric motors, etc. For example, an internal combustion engine typically converts chemical energy into mechanical energy.