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

Car batteries are constantly recharged by the engine via the alternator. All a car battery really needs to do is provide enough electricity for the car to start and the engine does the rest.