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US 5,350,640 AGranted
Detachable battery package with built-in integrating power meter
AssigneeNEC Corporation
InventorKeiji Masui
Life of this patent
Estimating the term…
Abstract
A detachable battery package is used for a portable apparatus, and comprises a secondary nickel-cadmium battery housed in a case for supplying electric power to the portable apparatus, and a volatile memory circuit storing an integrated value indicative of electric power consumption used in the portable apparatus so that an integrating electric power meter exactly indicates residual electric power of the secondary nickel-cadmium battery.
Claims6
A battery package used in an apparatus for supplying electric power, said battery package unit being detachable from said apparatus, said package comprising:
- a) a case having a hollow space;
- b) a battery unit housed in said case;
- and
- c) an electric circuit having a volatile memory circuit housed in said case, and supplied with electric power from said battery unit, said memory circuit storing information relative to electric power consumption of said portable apparatus and said electric circuit.
1 more element
Dependencies are inferred from the claim text.