What Is The Normal Charging Voltage For A Car Battery. Refer to Table above for deep-cycle floodedwet charging guidelines. However if the cold weather charging mode is chosen then it increases the charging voltage to 147 V.
With the negative terminal disconnected a healthy car battery will only self-discharge at 5 per month. So to answer your question Yes 15 volts is too high. The chemical reaction occurs in the battery system transforming the chemical energy into electrical energy to deliver voltage to the starter.
All batteries should be fully charged after each use.
When the engine is running this measurement should be 137 to 147 volts. However if the cold weather charging mode is chosen then it increases the charging voltage to 147 V. Is 14 volts good for a car battery. At what voltage should a car battery be replaced.
