The most common tool for measuring battery voltage is a digital multimeter (DMM), which provides highly accurate readings. Most voltages are reported using 16-bit values, although the 24-bit raw ADC data is also available in case you need better resolution for post-processing. To measure the direct current (DC) voltage, the DMM must be set to the DC voltage function, typically marked with a 'V' and a straight line. This application brief outlines three major functional tests that a battery tester performs while. To meet these demands, charge/discharge testing of battery packs is conducted, and data loggers are used to precisely measure the voltage and temperature of each individual cell. Depending on the required output.