Portable electronic apparatus and charge controlling method for portable electronic apparatus

A portable electronic apparatus having a portable electronic apparatus body, a rechargeable battery, a CPU, and a portable electronic apparatus charger for charging said battery;

• said portable electronic apparatus charger comprising
• quick charging means having a function of quickly charging said battery, and
• slow charging means having a function of slowly charging said battery,
• said portable electronic apparatus body comprising
• a power supply switch for switching on or off a connection from said battery to the entire circuitry of said portable electronic apparatus,
• connection detection means for detecting connection of said portable electronic apparatus body to said portable electronic apparatus charger,
• open/close detection means for detecting an on/off state of said power supply switch, and
• auxiliary power supply means for directly supplying an electric current from said battery to said CPU when said power supply switch is off while charging of said battery is proceeding,
• said CPU having
• a charge completion detection function of detecting a charged state of said battery from an output voltage of said battery, and
• a quick/slow switching controlling function of controlling said quick charging means to an on state and controlling said slow charging means to an off state when the charged state detected by said charge completion detection function is insufficient charge but controlling said quick charging means to an on state when the charged state detected by said charge completion detection function is sufficient charge.