Circuit - Button Battery Cell Internal Resistance Measurement Circuit - Circuits designed by David A. Johnson, P.E.


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Circuits designed by David Johnson, P.E.

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Last Updated on: Friday, August 29, 2008 02:34 PM

Oscillators: Astable Circuits Battery Testers

Button Battery Cell Internal Resistance Measurement Circuit
The open cell voltage of a small silver oxide button cell battery remains very close to 1.5 volts over most of the life of the cell. However, there is a relationship between battery health and the internal resistance of the cell. This circuit when used in conjunction with an oscilloscope will measure the internal resistance. You will have to use a known good cell as a reference.

Click on Drawing Below to view PDF version of Schematic

Oscillators: Astable Circuits Battery Testers

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