So it isn't the camera you are trying to keep warm, but the battery. The cost of the camera really doesn't matter, so the $500-1000 is moot, although it does mean that you are probably over spending.
You simply need the solar panel addition and batteries that recharge and you will get a much extended battery life.
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"If you look through your scope and see your shoe, aim higher." -- said to me by my 11 year old daughter before going out for hogs 8/13/2011
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