4 bq27426 Configuration and Learning Process

The gas gauge configuration and learning process is identical to that of a single-cell application. Equivalently, the bq27426 is operating from a single cell. Gauge current sensing is not affected by a 2-S battery. The battery internal impedance calculation is still valid. The total capacity of the 2-S is the same as that of a single-cell capacity. If a 1-mV accuracy voltage measurement is maintained, the overall accuracy of the gauge for 2-S battery is the same as for a single cell. The data flash configuration and the learned data flash image from a single cell can be used for the same cell in a 2-S configuration.