A charger comprising: a connecting portion (11A, 11B) configured to connect a battery; two protection devices (32, 24; 46, 48) configured to switch between inhibition and permission of charging the battery; a charging device configured to stop charging the battery in a case where at least one of the two protection devices (32, 24; 46, 48) is in a charging inhibited state, in which charging the battery is inhibited, and to perform charging the battery in a case where both of the two protection devices (32, 24; 46, 48) are in a charging permitted state, in which charging the battery is permitted; a control device configured to, when the battery is connected to the connecting portion (11A, 11B), bring the two protection devices (32, 24; 46, 48) into the charging permitted state to thereby permit charging the battery by the charging device; and a voltage detection device configured to detect a voltage value of a charging path from the charging device to the connecting portion (11A, 11B), wherein a first protection device (32; 46), which is one of the two protection devices (32, 24; 46, 48), is configured such that its power consumption in the charging inhibited state is lower than its power consumption in the charging permitted state, a second protection device (24; 48), which is the other of the two protection devices (32, 24; 46, 48), is configured such that its power consumption in the charging permitted state is lower than its power consumption in the charging inhibited state, and the control device is configured to perform the following steps when the battery is not connected to the connecting portion (11A, 11B), set the first protection device (32; 46) to the charging inhibited state and the second protection device (24; 48) to the charging permitted state, and thereafter switch the second protection device (24; 48) to the charging inhibited state when the voltage value of the charging path detected by the voltage detection device is equal to or greater than a predetermined specified voltage value. a connecting portion (11A, 11B) configured to connect a battery; two protection devices (32, 24; 46, 48) configured to switch between inhibition and permission of charging the battery; a charging device configured to stop charging the battery in a case where at least one of the two protection devices (32, 24; 46, 48) is in a charging inhibited state, in which charging the battery is inhibited, and to perform charging the battery in a case where both of the two protection devices (32, 24; 46, 48) are in a charging permitted state, in which charging the battery is permitted; a control device configured to, when the battery is connected to the connecting portion (11A, 11B), bring the two protection devices (32, 24; 46, 48) into the charging permitted state to thereby permit charging the battery by the charging device; and a voltage detection device configured to detect a voltage value of a charging path from the charging device to the connecting portion (11A, 11B), wherein a first protection device (32; 46), which is one of the two protection devices (32, 24; 46, 48), is configured such that its power consumption in the charging inhibited state is lower than its power consumption in the charging permitted state, a second protection device (24; 48), which is the other of the two protection devices (32, 24; 46, 48), is configured such that its power consumption in the charging permitted state is lower than its power consumption in the charging inhibited state, and the control device is configured to perform the following steps when the battery is not connected to the connecting portion (11A, 11B), set the first protection device (32; 46) to the charging inhibited state and the second protection device (24; 48) to the charging permitted state, and thereafter switch the second protection device (24; 48) to the charging inhibited state when the voltage value of the charging path detected by the voltage detection device is equal to or greater than a predetermined specified voltage value.