| 摘要 |
<p>PROBLEM TO BE SOLVED: To prolong battery life and to exactly detect battery exchange time by providing a voltage stabilization means and a voltage switch means performing a switch as to whether the output voltage of a battery is supplied as operating voltage or the output voltage of the voltage stabilization means is supplied, based on the control of a control means. SOLUTION: This equipment is provided with a voltage stabilization means 7 and a voltage switch means 6 performing the switch of state between that the output voltage battery 8 is supplied as operating voltage and that the output voltage of the voltage stabilization means 7 is supplied as operating voltage to the control of a CPU 1. When an operating current value is small in the key input waiting state from a key input means 5, voltage is controlled to be supplied from the battery 8. When the operating current value is large at the time of a data retrieval, etc., the display of a display means 4 is controlled to be erased and voltage is controlled to be supplied from the voltage stabilization means 7. When the output voltage the battery 8 lowers, an operator can be urged to exchange the battery 8 because the display of the display means 4 is made difficult to see.</p> |
