I finally outgrew my garmin 62 and it's time for a real chartplotter. I don't have a 12v system installed in my skiff and I don't any desire to add one. Has anyone installed something like a Elite 7 or similar on a grab bar with a self contained battery? I've toyed around with the idea of repurposing a laptop battery or maybe building a small battery box for a small lithium battery on the grab bar. I'm just trying to avoid installing a battery and battery box in the bow and chasing wires all over the place.