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Battery tester circuit diagrams

Self-Powered Fast Battery Tester Schematic
August 4, 2010

This circuit runs a fast battery test without the need of power supply or expensive moving-coil voltmeters. It features two ranges: when SW1 is set as shown in the circuit diagram, the device can test... [more]

circuit from:http://www.extremecircuits.net/2009/12/self-powered-fast-battery-tester.html

Battery Tester Circuit Schematic
August 4, 2010

Is the battery empty, or is there something wrong with the device? That’s always a difficult question when your walkman or some other battery-powered device appears to be dead when you switch it on. Before... [more]

circuit from:http://www.extremecircuits.net/2010/04/battery-tester-circuit-schematic.html