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Unfortunately both those solutions tend to chew through the battery fairly quickly so your deep-cycle battery would need to be a decent capacity.
Given that you only get some 1.5 hours out of your laptop battery I'm guessing it's possibly a reasonably powerful device?
Perhaps a more modest computer such as a small, cheap and possibly second-hand netbook might be a solution?[/QUOTE]
Actually they dont if done right , my laptop draws 0.9A or 2A at max load
so even a 60Ah battery will last 8hrs at least . I have been doing for some time now
and know it works.
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