What you could do is add up what you think you will use, a cooled camera and a lap top can consume a bit..but add up how many Amps and get a battery four times that number..also when you have mage in winter you tax the battery running it in the cold..in my case my previous 100 amp battery could die around 3 am...my lappy is a glutton that's where a lot of power goes..
Plus if out for a couple of days you could consider a Genny or panel.
Alex
Alex
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