Editor's note: The modern alternator is a very sophisticated piece of equipment which has virtually replaced the generator because of its lighter weight, higher efficiency, longer life and lower ...

Your car only starts reliably because two electrical workhorses share the load. The battery delivers instant power on demand, while the alternator keeps that energy flowing once the engine runs.

We earn commissions from purchases you make using links in our articles. Learn more. The alternator is a device that keeps your car’s electrical system running once the engine is on. It’s essentially ...