Importance

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Abstract

An apparatus for testing storage batteries under no-load and load conditions is provided which limits the duration of a test of any battery having adequate charge capacity and thereby protects both the apparatus and the battery from the hazards of excessive current. The battery testing apparatus includes a load circuit having current responsive switch means that automatically opens when its predetermined amperage rating is exceeded to provide a load test having a duration corresponding to the reaction time of the switch means. A voltage indicator, including a lamp or a voltmeter, detects and indicates the relative magnitude of the voltage available between the terminals of the battery so that the charge capacity of the battery can be determined both under no-load and load conditions. An ammeter may be also included for measuring the current passing through the load circuit during the load test.

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First Claim