Yeah I need to come up with a power solution myself. The FishPhone was still over 75% after a full day use but the stupid iphone had to be charged 3 times...lol.
I have a 12v Powerbar from CT
http://m.canadiantire.ca/en/pdp/auto...04p.touch.html
I figure I can mount the 12v 9ah battery I have from the boat fishfinder in the middle compartment of my sled (Commando Maxx) and use a battery strap to keep it in place. I may also use a tupperwear of the right size to keep any water out.