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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-indicat

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.

대표청구항 ▼

A portable lantern having a built-in battery tester comprising: (a) a lantern housing for holding batteries; (b) an electrically-powered light source mounted in said housing for energizing by the batteries in said housing; (c) a battery-testing means mounted in said housing with indicator means of t

A portable lantern having a built-in battery tester comprising: (a) a lantern housing for holding batteries; (b) an electrically-powered light source mounted in said housing for energizing by the batteries in said housing; (c) a battery-testing means mounted in said housing with indicator means of the battery-testing means detectable from outside said housing; (d) a three-way-switch means mounted in said housing placed in a first position to connect the light source with the batteries, in a second position to connect the battery-testing means with the batteries, and in a third position to disconnect the batteries; (e) first conductor means for electrically connecting said light source to said switch means and the batteries when said switch means is in said first position; and (f) second conductor means for electrically connecting said battery-testing means to said switch means and the batteries when said switch means is in said second position.