Electronic apparatus having battery power source

An electronic apparatus with a card-like electronic part on which an electronic circuit is mounted, the electronic apparatus comprising:

• battery which is disposed as a power source;
• a battery remaining capacity detector for detecting a remaining capacity of the battery;
• and
• a card driver powered by the battery and driving the card-like electronic part;
• wherein a driving capacity of the card driver is gradually increased in accordance with a detection output from the battery remaining capacity detector.

An electronic apparatus comprising:

• a battery power source connected to supply power to the electronic apparatus and for which the electronic apparatus serves as a nominal load;
• a voltage monitoring circuit which detects when an output voltage of the battery power source falls below a predetermined reference voltage;
• a pseudo-load circuit which includes a switch and a dummy load;
• a controller which, in response to the voltage monitoring circuit, conducts a load operation wherein the switch of the pseudo-load circuit connects the dummy load to the battery power source whereby the battery power source supplies power both to the nominal load and to the dummy load, and wherein on the basis of the output voltage of the battery power source when both the nominal load and the dummy load are connected to the battery power source, the controller determines whether to allow a further load to drain the battery power source.