How do car batteries work?

Question

Hi all,

I always wondered how a car battery is able to charge cell phones, radio, dashboard and all other things that requiere electricity, and not need to to be recharged for a couple years. Why does it not die out sooner? Can someone please on how it’s able to achieve this curious feat?

Thanks!

In: Engineering

Answer 1

The battery inside a car is really only used to start the car, and the alternator is what runs the car after the initial start up and also charges the battery as the vehicle runs, so thats why they last so long without charging and are also able to charge all of your mobile devices.