>It’s interesting that electronic calculators are basically the only type of devices ever to have successfully powered by integral solar panels. Because they a

>It’s interesting that electronic calculators are basically the only type of devices ever to have successfully powered by integral solar panels. Because they are ultra-low powered devices. If tiny solar cells can power that kind of device, then it can also be powered through kinetic energy (i.e. user's movement) as well ... Or you could spend $5 and put a standard watch-type battery in there which will last you years. So even there solar panels are a bit gimmicky. But ok, do whatever you like.