12 Volt Car Battery Voltage Chart

These lead acid cells in series forming a 12 volt battery.

12 volt car battery voltage chart. There is a very big difference when a car battery drops even a small amount of voltage. The chart is listed below. Battery voltage state of charge table. The figures are based on open circuit readings.

11 75 11 89 volts means your battery is dead. Voltage is crucial when it comes figuring out whenever a battery is still good to go or when a battery is dead but of course there is more to the terms than meets the eye and they all have to do with how much voltage is floating within the cell of the battery. When a car drops for instance from 12 6 to 12 0 there will be 75 difference. With experience one can accurately determine state of charge using a voltmeter.

A reading of 12 65 12 77 volts means your battery has a full charge. Then the leads are connected to the battery terminals positive to positive and negative to negative to get the voltage. In fact there is a whole car battery voltage chart and if you want to know about the overall condition of the battery a voltage test seems to be the right option. The straightforward answer is.

But the voltage is not a fixed number. What you need to know about the ideal car battery voltage range. Other types of lead acid cells like car. But first a few important notes and caveats.

A fully charged car battery has 12 6 volts. While most people know that car batteries are 12 volt dc batteries there s a lot more to the story than that and a car battery voltage range test may be just what you need to find out all the necessary details about your battery s overall condition. Those of you using a 24 volt system with twelve lead acid cells in series must multiply the voltage in the text and on the charts by two. The voltage versus state of charge soc profiles will match those of similarly constructed cells.

But the voltage is not a fixed number. To get a true voltage reading of the cars battery it is important to measure the voltage after the car has been sat for a period with the engine off preferably overnight this provides you with the car battery open circuit voltage or also know as the resting voltage. A fully charged car battery voltage should be 12 6v or above this is with the engine off. Battery is charged the indicated voltage increases and as discharging occurs the indicated voltage decreases.

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. Percentage of charge 12 volt battery voltage specific gravity 100 12 70 1 265 95 12 64 1 257 90 12 58 1 249 85 12 52 1 241 80 12 46 1 233. 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. The table below shows the voltage and approximate state of charge for each type of battery.

When comparing your car battery s voltage measurements with the normal. I put together the following battery state of charge chart which indicates the state of charge percent as it relates to battery voltage or specific gravity. Dead 12 volt battery of voltage range is it dead as a car battery.