Hi @egoltzman, Yes, your calculation is correct for battery life. Most batteries do not have 15 year shelf-lives due to self-discharge. Once you factor in self-discharge, you are likely much less than 15 years.
It looks like those events may be very short. Given the low average current, the increased measurement inaccuracies when your JS220 autoranges may matter to this measurement. Here are some things you can do to improve measurement accuracy:
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Set the JS220 for a fixed 18 mA range, which is the smallest range larger that what you measure. Here is the spec:
You can perform a current range offset calibration (press the “Calibrate” button on the Device Control widget) for better accuracy. Then, zoom in on one of these events. If they are shorter than 100 µs or so, may need to do some additional work to ensure that the measurement error is low enough for your desired measurement accuracy. I am happy to take a closer look if you want to share a picture of an event or a short JLS file. -
Bound the JS220 autoranging. The JS220 normally autoranges to the 10 A range. Even though it spends very little time here, the ±1.5 mA can be significant for average currents this low and events this frequently. You can constrain the current ranging like this:
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You can display the current range. Select r in the Device Widget and on the Waveform widget. This gives you greater visibility in what your Joulescope is doing and the measurement error.
