The invention discloses a portable handset charger that comprises dry battery which provides charging current, main circuit of charging and pin seat, the positive pole of the dry battery is connected with the input of the main circuit of the charging, it characterized in that the pin seat possesses the first output end, the second output end and the third output end which are not conducted, the output end of the main circuit of the charging is connected with the first output end via the third resistance which is used to limit current, the grounding end of the main circuit of the charging is connected with the second output, the negative pole of the dry battery is connected with the output of the third, inserted switch is mounted between the second output and the third output, when the inserted switch is inserted into the pin seat, the negative pole of the dry battery is conductive with the main circuit of charging, when the inserted switch is draw, the negative pole of the dry battery is not conductive with the main circuit of charging, any static current will be generated.