For those of you that go out into the field for long periods of time (4 days or more at a time) what do you use out on the bush for power? We all know how much car batteries weigh, solar panels are expensive (well at least those that push enough power to run a small electric sump pump are) and those smaller batteries just don't last long enough.
Do you pack large batteries? Small batteries? Solar panels? or do you rough it the entire time your out there with nothing more than a few small batteries to run your flash lights at night?
Has anyone tried building a water wheel using a car alternator to charge a car battery that they have brought out?
The reason I ask is because there are a couple things I like to bring with me.
XM Satellite Radio Receiver - For the evening when the days work is done.
Radio - To play the XM Satellite Radio
12V Sump Pump - for the finishing sluice I'm building
At the end of the day, these devices will run out of power as I suspect a 12V Marine Batteries will fail within a day or two - especially since the recirculating finishing sluice I'm building is set and forget for the most part and will run for a couple hours non stop with a little maintenance every 15 minutes or so (Oh yes, I have an ingenious design coming up