Battery Size Resistor Measurement

The battery size, capacity is determined by measuring the voltage on the BSI pin on the battery pack when the battery is attached to the phone. The auxiliary channel 2 is used for this purpose. The BSI signal is pulled up on the base band using a 47 kohm resistor and the resistor inside the battery pack is reflecting the capacity of the battery. There are two special cases to be detected by the MCU. The first case is the Lithium battery. The Lithium battery has reserved values in the battery...