With the fan running all the time, plus the heaters for both ends of the finderscope and eyepiece, my 12v 7amp/hr battery gives me about 7 hours.
Now that's with the heaters running between 1/4 and 1/3 capacity.
If I have to crank it up, I lose between 1 to 2 hours.
This means that two batteries will see me through the longest winter nights without a problem.
Quote:
Originally Posted by Isdonisgood
John, how many hours do you get out of such a battery running say, a couple dew heaters and a fan?
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