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I thought you could use a different battery for this unit other than a marine battery. Carrying a deep cycle on the ice does not sound like much fun.
I just got one for christmas also hope it works out pretty good.
you can hook up a 12vt recharge to it
Seems like another downside of this unit is that it doesn't have a video out jack so you could never record anything.
I used an old soft sided cooler for my case - works awesome, ran the cables for the extra battery in the sidepockets.
Looking forward to using mine soon.
catching so many fish forgot to try mine out today.