Flashlight with battery tester

Details Flashlight with battery tester Flashlight with battery tester

1988-02-25

1990-10-09

Stephan, Steven L.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

340636, 362208, H02J 704

Patent

active

049623478

ABSTRACT:
A flashlight or a portable lantern having a built-in battery tester to determine the voltage or capacity of the battery, either under an electrical load or under no electrical load. The battery tester can comprise a voltmeter, ammeter, liquid-crystal cell, LED, color-indicating redox voltage-indicator cell, or a voltage battery-monitoring circuit that intermittently monitors the voltage of the batteries for brief pulses, compares the battery voltage with the standard reference voltage, and initiates a signal system if the battery voltage falls below the standard reference voltage.

REFERENCES:
patent: 2921254 (1960-01-01), Marche
patent: 3383580 (1968-05-01), Wallace, Jr.
patent: 3534354 (1970-10-01), Galginaitis
patent: 4231026 (1980-10-01), Sullivan
patent: 4432041 (1984-02-01), Pfisterer et al.
patent: 4563629 (1986-01-01), Keiper
patent: 4626765 (1986-12-01), Tanaka
patent: 4701835 (1987-10-01), Campagnudo et al.
patent: 4725784 (1988-02-01), Peled et al.

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