Here's the breakdown:
* Most car batteries are 12-volt. So, a 12-volt charger is typically the right choice.
* A 6-volt charger will not charge a 12-volt car battery. It's not powerful enough and could potentially damage the battery.
* Some older vehicles (like some golf carts) might use 6-volt batteries. In that case, a 6-volt charger would be appropriate.
Important Note: Before charging any battery, always consult the owner's manual for specific recommendations on charging voltage and current.
In short: A 6-volt charger won't work for a standard 12-volt car battery. You'll need a 12-volt charger.