car battery charge voltage

With the engine off, you should get a reading of 12.6 volts. A fully charged car battery voltage should be 12.6v or above, this is with the engine off. When properly charged, and in good working order, a car battery will typically read at about 12.4 to 12.6 volts and have enough reserve capacity to power a 25A load for anywhere from nine to 15 hours. Electrolyte gravity voltage test This is the method used for non-sealed lead acid batteries. A reading of 12.65-12.77 volts means your battery has a full charge. Setting the voltage threshold is a compromise and battery experts refer to this as “dancing on the head of a pin.”

11.75-11.89 volts means your battery is dead.

A battery with high leakage may never attain this low saturation current, and a plateau timer takes over to end the charge.

12 volts is the standard automotive battery in today’s vehicle and each of the battery has 6 cells with a voltage of 2.1. Charging your battery is really simple, but batteries can give off hydrogen gas while they're being charged - especially if they're being charged at a higher voltage by a fast charger. When Fully Charged, How Many Volts Should A Car Battery Have? When a car drops, for instance, from 12.6 to 12.0, there will be 75% difference. 12.45-12.54 volts means you have a 75% charge, 12.24-12.29 is 50% charged, and 11.99-12.06 volts is 25% charged.

Fully charged automotive batteries should measure at 12.6 volts or above. The ideal car battery voltage range will provide you with a relevant interval according to which you can measure precisely what the voltage says about the battery’s current charge. There is a very big difference when a car batterydrops even a small amount of voltage. The correct setting of the charge voltage limit is critical and ranges from 2.30V to 2.45V per cell. A fully charged car battery has 12.6 volts.

Keep the charger away from the battery, and make sure you don't leave anything on top of the battery. When the engine is running, this measurement should be 13.7 to 14.7 volts. To charge a battery, a charger or your car's alternator needs to raise the voltage across the battery posts.

A perfect voltage with the engine running is between 13.7 and 14.7V.