How much voltage is in an average car battery?

Question

does it differ between which car it's for? or are all car batteries interchangeable? (If you can't tell I know nothing about cars-so I apologize for my ignorance up-front...sorry.)

Answer 1

A car battery is 12.6 volts when fully charged.

When it is actually being charged, it is 14-15 volts.

All cars have the same voltage batteries, at least all current cars. Some older cars have -12v systems, or 6 volt systems, and there is a push to move new cars to 36 volt systems.

But the capacity of batteries and their physical size will vary from car to car.

.

Answer 2

12 volts.

But, batteries are not totally interchangeable. The amps matter too in how much power there is in the battery.

Answer 3

Mosr car batteries are rated 12 volts DC but, it vairies in ampere hours capacity. Many cars are with batteries rated 100 ampere-hours but, other bigger units has more depending on its size and capacity of air conditioner.