Portable wireless telephone apparatus with use specific power monitoring

A portable wireless telephone comprising:

• an antenna;
• a cellular transmit/receive means connected to said antenna for transmitting data to or receiving data from a cellular base station;
• a cordless transmit/receive means connected to said antenna for transmitting data to or receiving data from a base unit of a cordless telephone;
• a mode selecting means for selecting an operation mode of the portable wireless telephone between a cellular mode and a cordless mode;
• a battery;
• a first charge condition detecting means connected to said battery for generating a first charge signal if a battery charging condition is not sufficient enough to operate the portable wireless telephone in the cellular mode;
• a second charge condition detecting means connected to said battery for generating a second charge signal if the battery charging condition is not sufficient enough to operate the portable wireless telephone in the cordless mode;
• a display means;
• and
• a control means, wherein said control means controls said display means to generate a first warning, which indicates that only the cellular mode is no longer operative, whenever said first charge condition detecting means generates the first charge signal, and further controls said display means to generate a second warning, which indicates that all the modes are no longer operative, whenever said second charge condition detecting means generates the second charge signal.

A portable wireless telephone comprising:

• an antenna;
• a cellular transmit/receive means connected to said antenna for transmitting data to or receiving data from a cellular base station;
• a cordless transmit/receive means connected to said antenna for transmitting data to or receiving data from a base unit of a cordless telephone;
• a mode selecting means for selecting an operation mode of the portable wireless telephone between a cellular mode and a cordless mode;
• a battery;
• a micro computer accommodating a counter and memorizing a first charge count required for operating the portable wireless telephone in the cellular mode and a second charge count required for operating the portable wireless telephone in the cordless telephone, so that said first and second charge counts can be used as reference values when checking a remaining energy of the battery;
• and
• a display means,
• wherein said micro computer causes said counter to count a value equivalent to electric current charged into or discharged from said battery and compares a present count value of said counter with said first charge count, so that said micro computer controls the display means to generate a warning for not operating the cellular mode if the remaining energy of the battery is not sufficient enough to operate the portable wireless telephone in the cellular mode, and further compares the present count value of said counter with said second charge count, so that said micro computer controls the display means to generate a warning for not operating the cordless mode if the remaining energy of the battery is not sufficient enough to operate the portable wireless telephone in the cordless mode.