Originally Posted by 0rion
Why not make a battery coated in solar collecting material, so when the batteries die, you can sit them on a table in the sun and wait 10 minutes for them to charge? Screw winding that thing 10,000 times for 5 minutes of battery life.
You'd need some thin film solar material to apply to the batteries, but nanosolar has stuff you could coat a battery with, and Im sure other companies do too.
I'm pretty confident battery companies have considered that possibility, but there's probably a pretty good reason they don't just do it on the battery. My guess is that it has something to do with batteries exploding after being exposed to the heat for too long, which seems pretty in-line with the warning batteries are required to have on them about being exposed to heat and flame
This is pretty awesome for the times when you really need a battery charge. I can definitely see this type of battery being beneficial to walkie-talkies, or other transmission devices.