Battery pack
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United States of America Patent
Stats
-
Oct 19, 2004
Grant Date -
Jul 31, 2003
app pub date -
Jan 28, 2003
filing date -
Jan 28, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A chargeable battery or a battery pack stores electrical energy, and supplies the electrical energy to a portable terminal device connected to the battery pack. A display device of the battery pack derives a value of a current flowing through a sensor which is connected to the chargeable battery. The display device derives the remaining amount of electrical energy stored in the chargeable battery, by adding up the derived current value. The display device includes a plurality of photodiodes, and shows the remaining amount of electrical energy stored in the chargeable battery, by lighting up corresponding number of photodiodes corresponding to the derived remaining amount.
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