To obtain a strap-type extreme emergency charger for a portable telephone that can immediately be used at any place for emergency, when a telephone call becomes impossible due to the lowering of the capacity of a standard battery contained in a portable telephone body.

This charger can always be carried by accommodating a simplified charger of the portable telephone in a mascot attached to a strap of the portable telephone. More concretely, charging powers from two directions are fed to the standard battery by connecting an input and an output of a charging circuit between an output connector plug that is suitable for a multi-purpose connector arranged on the bottom of the portable telephone and three pieces of button-shaped lithium batteries or electrodes of a 006P-type dry battery.