Battery replacement system for battery-powered digital data hand

Details Battery replacement system for battery-powered digital data hand Battery replacement system for battery-powered digital data hand

1991-04-22

1994-05-03

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 85, H02J 904

Patent

active

053090314

ABSTRACT:
A battery-powered lap-top computer has a main battery for ordinarily supplying power to the computer circuitry. A reserve battery is connected through a manual switch to the circuitry. When the main battery starts to lose its charge, the manual switch is operated to connect the reserve battery to the circuitry prior to removal of the main battery. A new main battery is installed and the switch is operated to disconnect the reserve battery from the circuitry. Provision is made for the main battery to slowly charge the reserve battery.

REFERENCES:
patent: 4214172 (1980-07-01), See
patent: 4315162 (1982-02-01), Ferguson
patent: 4559456 (1985-12-01), Yamamoto et al.
patent: 4677311 (1987-06-01), Morita
patent: 4965462 (1990-10-01), Crawford
patent: 5028806 (1991-07-01), Stewart et al.
patent: 5086235 (1992-02-01), Marquet et al.
patent: 5148042 (1992-09-01), Nakazoe

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