Originally Posted by
GeoKrpan
That is a great idea. This invention, making electricity from heat, is great. Think of all the waste heat that could be put to work. Home heaters, exhaust pipes, etc,
Here is a little device that runs on AA batteries. I talked to a guy who says it will charge his phone 3 to 4 times.
I've tried those before, they don't really charge well, not unless you leave a modern smart phone turned off and let it charge up slowly. The best it does is to hold a certain battery level.
Poor choice for those who use phones as GPS, but then phone GPS typically use data, and that's probably not a great idea if any carrier charges roaming for going out of the area (don't know if that applies anymore)