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There were calculators in the '90s where the display would go faint when you covered the tiny solar panel. Perhaps the battery was already drained. Quite common

There were calculators in the '90s where the display would go faint when you covered the tiny solar panel. Perhaps the battery was already drained. Quite common I would say.

saagarjha 2y ago
I had one in the 2010s when I was going through grade school. Casio fx-260 solar; it would die in seconds if you covered the panel.
- aitchnyu 2y ago
  The screen would go faint and slow when the power sources werent running at peak.