All the questions about the solar cell working indoors, it seems to me that the unit's primary source is solar. If that comes up short, it taps into the battery for whatever it needs. It's almost like the Prius of optics.
I do wonder what the battery life would be if left on and stored in a dark case so it was instantly ready. Then it would be pulling from just the battery and life would be less I would think. Or just store it powered off and go through the motions of powering it on when removing from trunk/case.
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