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Right but that's missing the key point of combining the solar cell with a rechargeable coin cell, where the lithium battery is intended to be capable of powerin
by ethagknight 3y ago
Right but that's missing the key point of combining the solar cell with a rechargeable coin cell, where the lithium battery is intended to be capable of powering the device for several months on end. If the coin cell provides 4 months of operation from some device, maybe a coin + solar could provide indefinite service in the right scenarios?
- bastawhiz 3y agoIt would not, because the solar strip offers less power than the device consumes—by a lot. The cell would not really ever charge. You'd need a solar strip that's pretty darn large (by my rough math, 1-2 index cards in area, at least). At that point, how is it a useful form factor? And again, that's assuming the best possible lighting, which is not the case for either a light switch or an air tag. I suppose you could use a little solar strip to make a button battery last longer? But you're talking about a difference of like 100 days of life versus 102 days of life.