BATTERY PACK AND ELECTRICAL DEVICE EMPLOYING SAME

Provided is a battery pack in which the voltage of each battery cell is monitored using an inexpensive general-purpose microcomputer. A battery pack comprises: a plurality of battery cells connected in series; a plurality of voltage detection units which detect the voltage of each of the battery cells; and a microcomputer which measures the voltages of the battery cells from the output of each of the voltage detection units. Switch control circuits for switching on or off the outputs from the voltage detection units to the microcomputer are respectively arranged on each of the voltage detection units. Voltage divider circuits dividing the detected voltages into voltages lower than or equal to the power supply voltage of a control unit are arranged on the output sides of the voltage detection units. The microcomputer inputs the voltages divided by the voltage divider circuits and measures the voltages of the battery cells.