80 minutes

80 minutes by S Migol
80 minutes, a photo by S Migol on Flickr.
Via Flickr:
Holding at 4C. The heat sink is rather warm and makes me think that this might be the limiting factor. Without a better heatsink the cooler might not be able to drop the temperature more. I futher tested this idea by putting a larger table fan near the heatsink and allowing it to blow on the device. Only by this method was it able to reach 0C.