Battery replacement system for battery-powered digital data handling devices
US5309031A · kind A · utility
22Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1991 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Apr 22, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.