Battery pack
AssigneeNEC Infrontia Corporation
InventorHirotsugu Matsuyama
Life of this patent
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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.
Claims13
A battery pack comprising;
- a battery which stores electrical energy;
- a remaining amount deriving unit which derives a remaining amount of the electrical energy stored in said battery;
- and
- a first showing unit which shows the remaining amount derived by said remaining amount deriving unit.
Dependencies are inferred from the claim text.