I don't know if this is technical enough to be put in here, but anyway...
I dissected one of those shaking flashlights, and instead of using a capacitor to store charge, it uses this thing. I'm pretty sure that's not a capacitor since it doesn't even have any capacitance rating. Just "NT 473" whatever that means. Google doesn't find anything.
http://img172.imageshack.us/img172/7540/nt473.jpg
I dissected one of those shaking flashlights, and instead of using a capacitor to store charge, it uses this thing. I'm pretty sure that's not a capacitor since it doesn't even have any capacitance rating. Just "NT 473" whatever that means. Google doesn't find anything.
http://img172.imageshack.us/img172/7540/nt473.jpg