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US 5,858,570 AGranted
Communication apparatus, electronic apparatus, and battery management method
AssigneeSony Corporation
InventorAtsuhisa Akagi
Life of this patent
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AssigneeSony Corporation
InventorAtsuhisa Akagi
Estimating the term…
A communication apparatus which prevents problems caused by the increase of internal resistance in a battery. The apparatus obtains the internal resistance (.DELTA.V) of a battery, and if the internal resistance obtained is over a reference value, a message to change the battery is displayed to the user. The user exchanges the battery directed by the display, so that the problems due to the increase of the internal resistance can be prevented. Further, the battery voltage during transmission is predicted from the internal resistance, and if the predicted value is lower than a predetermined reference voltage, a message that no residual battery exists is displayed to the user, thereby avoiding the situation where the battery voltage becomes lower than the reference voltage because of the internal resistance at the moment of transmission, resulting in the apparatus being suddenly reset and the conversation cut off without any warning.
A battery operated electronic apparatus comprising:
A battery operated communication apparatus for radio communication comprising:
The communication apparatus as claimed in claimed 2, wherein said measuring means detects said voltage values between a pair of terminals of said battery.
A battery management method for a battery operated communication apparatus comprising steps of:
Dependencies are inferred from the claim text.