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US 2004/0110542 A1Published application
Backup power supply for portable telephone
OwnerKazunari Shozeninventor
Life of this patent
Estimating the term…
Abstract
A backup power supply is detachably connected with a portable telephone and has a power-feed circuit, which includes at least four batteries and which is capable of supplying power. At least one of the batteries is disconnectable. When the at least one disconnectable battery is disconnected, the remaining batteries are capable of forming a power-feed circuit to supply power.
Claims7
A backup power supply which is detachably connected with a portable telephone, the backup power supply comprising:
- a power-feed circuit, which includes at least four batteries and which is capable of supplying power, at least one of the batteries being disconnectable,
- wherein, when the at least one disconnectable battery is disconnected, the remaining batteries are capable of forming a power-feed circuit to supply power.
Dependencies are inferred from the claim text.