CHARGER

PROBLEM TO BE SOLVED: To provide a charger capable of charging a plurality of batteries with inexpensive constitution simultaneously, in other words, capable of charging each battery by the same capacity. SOLUTION: A charger is provided with a power-supplying part 1 for supplying a charging current, a charge control circuit part 2 for controlling charging, and switching devices SW1-SW2 for performing charging current control. After a charge current is supplied to a battery B1 for a fixed time period, the charging current is supplied to another battery B2 for the same period of time. This is performed for all batteries connected and sets one charging period T. By repeating the charging periods Ts until charging completion is detected, each of plural connected batteries can be charged with the same capacity by inexpensive constitution, and a charger having superior effect of being hard to generate capacity variations among batteries becomes available.