How Many Volts Should A Good Car Battery Have. A good battery should be between 124 to 126v at rest it will drop some if any accesories are on lights radio phone or gps chargers flashers etc if you have an automotive voltageamperage tester available you can do a load test on the battery hook it up and load it by 12 the cca rating of the battery for 15 seconds if it drops below 10v its time for a new battery. Leave the car overnight preferably longer and test before you start the car in the morning to get.
When the Car Is Running. When Fully Charged How Many Volts Should A Car Battery Have. Ad Need a New Battery.
If it reads 124 volts this means the battery is operating at only 75 percent capacity.
When a car drops. 12 volts is the standard automotive battery in todays vehicle and each of the battery has 6 cells with a voltage of 21. If the battery is below 126 volts you should attempt to charge it with a battery charger. However you should know that some chargers will not recognize or charge any battery that has been discharged below a minimum voltage level sometimes as high at 10.
