Operation CHARM: Car repair manuals for everyone.

6.1 Battery Voltage Correction Values

If the Battery temperature is below O~C (32~F) a correction value applies.

Measured value correction is only necessary if battery temperature is below O~C (32~F). The value correction is 0.10V and has to be added to the measured value. No correction is necessary at battery temperatures above 0~C (32~F).

Example:
Battery temperature approximately -3~C (27~F) measured value 12.4V.

Correction value = 0.10V

Corrected measured value: 12.4 + 0.10 = 12.5V. (charging condition approximately 80%)