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The coin cell problem
A sensor that has run out of battery does not tell you it has run out of battery. Why coin cells fail in the cold, why lithium matters, and why last-seen is a reading in its own right.
A sensor that has run out of battery does not tell you it has run out of battery. Why coin cells fail in the cold, why lithium matters, and why last-seen is a reading in its own right.
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