If you’re looking for a tiny wireless web camera. Then Thanko’s new wifi web camera is worth a look. Capable of running for five hours on one charge a small camera can capture up to 15 frames per second. Which it then sends back to the receiver plugged in to the USB port on your PC which can be up to 10 meters away.
To conserve battery power you can also attach the camera to PC via cable if required. Unfortunately it only available in Japan at the moment can be purchased for for 7,980 yen or approx. $88.62 from Thanko directly.