Two months to go from 1.0 V (!) to nearly zero
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As good a use for dead cells as I can think of
The LED waveform shows it needs about 2 V
It’s still flashing
A 1 MΩ resistor serving as a mechanical strut
The LED lights brightly, then fades away
A dirt-cheap single-trace oscilloscope can get you quite a ways to the goal
The Smell of Molten Projects in the Morning 