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Those of you that use a CR2032 battery, have you ever looked at the datasheet? Per this one https://www.mouser.com/datasheet/2/315/3627_fileversion-1627278.pdf for instance, using just 2mA drops the capacity significantly in terms of mAhs. At the same time, a *single LED* uses much more than that, so it seems like kind of a weird stat. I know at some point higher currents really destroy them, but certainly they are good for more than a couple mA of current?
This project uses a CR2032 to power a little OLED screen and can supposedly run for 20 hours, which one would think would draw much more than 2mA or whatever. For that matter, “throwies,” which just attach an LED to a coin cell battery should use around 20mA and last for a couple weeks IIRC. That is 480mAh/day, though one might assume the throwies limit this current naturally.
Anyway, any thoughts on CR2032 usage beyond something really low power? Obviously it’s been done.
Tangentially related to my previous CR2032 power post, I’m thinking about getting a datalogger to look at these batteries in a bit more detail. This ESP32-based device: https://www.tindie.com/products/30835 looks pretty good for the price (~$30), and it would seem that I could use an ADC pin to measure the battery’s voltage over time in different scenarios.
Thoughts? Better ideas? I keep thinking my handheld OWON scope https://embeddedcomputing.com/technology/debug-and-test/oscilloscopes-analyzers-generators/owon-hds2102s-250-handheld-scope-review or some other piece of equipment that I own could do it, but maybe not… at least not without some tinkering, ha.
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