Mobile phone with power saving function

1. A mobile terminal comprising:

a battery;

a power supply block which supplies power of said battery;

a radio communication block which communicates with a base station when said power is supplied from said battery through said power supply block, said radio communication block having both a transmission function and a reception function;

a first switch which is interposed between said power supply block and said radio communication block;

a key operation section to which said power is always supplied from said battery through said power supply block;

a control unit which controls said first switch to stop the power supply from said battery to said radio communication block to stop communication between the mobile terminal and the base station in response to a manual operation of said key operation section;

a base band block which is connected with said first switch and said radio communication block;

an application function block to which said power is always supplied from said battery through said power supply block and is possible to accomplish application functions, at least one said application function being selectively associated with a communication involving said radio communication block; and

a second switch which is interposed between said application function block and said base band block,

wherein the power supply to said base band block is stopped when said control unit controls said first switch to stop the power supply from said battery to said radio communication block in response to said manual operation of said key operation section, and

wherein said control unit is contained in said application function block and controls said second switch to disconnect said base band block from said application function block.

2. The mobile terminal according to claim 1 , wherein said control unit controls said first switch to turn back on said power in response to a manual operation of a key of said key operation section.

3. The mobile terminal according to claim 1 , wherein said control unit comprises a timer to which a predetermined time is set, and

when said timer measures the predetermined time, said control unit controls said first switch to turn on.

4. A mobile terminal, comprising:

a battery;

a power supply block which supplies power of said battery;

a radio communication block which communicates with a base station when said power is supplied from said battery through said power supply block, said radio communication block having both a transmission function and a reception function;

a first switch interposed between said power supply block and said radio communication block;

a key operation section to which said power is always supplied from said battery through said power supply block;

a base band block to which said power is always supplied from said battery through said power supply block which accomplishes application functions other than a communication function using said radio communication block, at least one said application function in said base band block being selectively associated with a communication involving said radio communication block;

a second switch interposed between said base band block and said radio communication block; and

a control unit which is responsive to a manual operation from said key operation section that controls said first switch to stop the power supply from said battery to said radio communication block, and controls said second switch to stop communication between said base band block and said radio communication block.

5. The mobile terminal according to claim 4 , wherein the control unit controls said first switch to stop communication between the mobile terminal and the base station.

6. The mobile terminal according to claim 4 , wherein the control unit controls said second switch to stop communication between the mobile terminal and the base station.

7. The mobile terminal according to claim 4 , wherein the control unit controls said second switch to disconnect said base band block from said radio communication block.

8. The mobile terminal according to claim 4 , wherein said control unit comprises a timer to which a predetermined time is set, and

when said timer measures the predetermined time, said control unit controls at least one of said first and second switches to turn said power back on.

9. The mobile terminal according to claim 4 , wherein said control unit controls said first and second switch to turn back on said power in response to a manual operation of a key of said key operation section.