CHARGING SYSTEM AND CHARGER FOR REDUCING INRUSH CURRENT

A charging system (100) includes a battery pack (10) including at least one battery cell (12) and a battery management module (11), and a charger (20) including a connector (21) configured to detect a connection with the battery pack (10), a communicator (22) configured to communicate with the battery management module (11), and a controller (23) configured to control charging of the battery pack (10). The controller (23) of the charger (20) is configured to output a wake-up voltage when the connection with the battery pack (10) is detected through the connector (21), receive a value of a battery voltage from the battery management module (11) through the communicator (22), determine a charging start voltage based on the value of the battery voltage, and start charging the battery pack (10) after outputting the charging start voltage.