Good news! We have had 2 - 220 ohm, 1/2 watt, 5% carbon film resistors cooking at the end of 4 AA batteries for about 12 hours now and see no significant loss of temp! Yehaaa .. looks like we might be getting closer. Tomorrow we get the actual Imager to do the real life test. I get what you guys are talking about as far as outside and inside temperatures and it's effects on the components. I am thinking about hooking up 4 batts to 2 - 150 ohm, 1/2 watters to see if we get a slightly higher temperature for a more dramatic effect. More testing to see battery life!
thanks all...!!!!! been great! I will let you all know our results.