Is a car battery 6 volt or 12 volt?
Thereof, how do you tell if a battery is 6 volt or 12 volt?
6-volt batteries have three cell holes under the cap, while 12-volt batteries have three cell holes under each cap, for a total of six cells.
Correspondingly, can you use a 12 volt battery on a 6 volt system?
You can install the 12v battery as positive ground in place of the 6 volt unit. Leave the lights and radio turned off while you have the 12 v battery installed. Yes, it will work, Starter will spin up quick. You'll need to use a Ballast Resistor to protect the Coil & Points.
The higher the number of volts, the more powerful the car. So a 6V kids electric car is the lowest power, a 12V is higher, and a 24V even higher than that. A car with a 6V motor needs a 6V battery. If a 12V battery is used in a 6V car, then the car's motor could burn out due to the excess power.