[Stonius (Markus)]

I've normally had access to mains power when observing, but I'm wanting to investigate a battery setup.


I know a deep cycle batter of around 140AH is ideal (and heavy!).


But I have a car battery and another lead acid battery, which I'm thinking of connecting in parrallel to see how long this can go for before it dies. But I have a sneaking suspicion that it's not a test you can safely do.


At least, I know cutting the power on the camera would mean the sensor would be in danger of damage from thermal shock as the cooler shuts off with no 'warm up slope'.



But even then, if I were to run it until it hit a certain level of 'flat' before failure, what would that be?


Is there an experimental solution?



Thanks for any help.


Markus