CR123A battery voltage
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I just replaced the batteries in two sensor nodes and got some unexpected battery voltage measurements. Each sensor has two CR123A batteries in series. The voltage is measured with a voltage divider connected to an analog input. Before the batteries was replaced both sensors worked as expected.
Both sensors got brand new Sony CR123A 3V batteries at the same time. The battery voltage measurements from one sensor looks strange. Any ideas?
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Chemistry. I have no idea.
Initial voltage increase is common in e.g. AAs if you switch load type and/or let the them rest for a while. I often put used batteries from my kids toys in my sensors.
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