Patent ID: 8666384

Claim:
A cordless telephone set which performs radio communication between a handset and a base unit, wherein the base unit includes: a first radio communicating section which performs modulation and demodulation with voltage from an external power supply; and a charging circuit which outputs a predetermined voltage based on the voltage from the external power supply, wherein the handset includes: a secondary battery which is charged by the predetermined voltage when the handset is placed on the base unit; a second radio communicating section which performs modulation and demodulation with voltage output from the secondary battery; and a display section which displays predetermined information, wherein: the base unit further includes a determination unit which determines whether the voltage from the external power supply exceeds a predetermined value, and the display section displays information regarding a status of a power supply to the base unit as the predetermined information in the event that the determination unit determines that the voltage from the external power supply does not exceed the predetermined value.