Does anyone know where I can buy cheap, very thin (<=1mm) batteries?
I don't really need any significant density (a few mAh is fine). I've found a few places that make them, but no one that sells them for reasonable prices or in small quantity.
Application is I'm applying for jobs the next couple months and looking to make some circuit board business cards.
(can't do USB power, most companies don't allow plugging in unknown USB devices)