Power Source For A 12 Volt Electric Filleting Knife

[Tomcat]

We have a week long walleye trip planned for next August to a very secluded area where there is no access to electricity. We've been researching various power sources to run spotlights (returning to camp in darkness) or other equipment (like a 12 volt electric filleting knife). Although I don't have any problems filleting walleye with a non electric fillet knife, I'm interested in looking at options. I read elsewhere that a portable jump start/power supply was used successfully for a week as the only power source for a 12 volt filleting knife. Research on portable jump start/power supplies indicates that many contain a 20 amp hour battery. Consequently, why not simply take a 20 amp hour deep cycle battery to power a 12 volt filleting knife rather than a portable jump start/power supply? To facilitate responses, here's an example of a portable jump start/power supply that weighs less than 25 lbs. It contains a 19 amp hour battery. http://www.tylertool.com/blackanddecker44.html Thanks in advance.

[Terry]

there is no reason in the world to not just use a battery

[Fisherman]

Go to Princess Auto and get yourself a 20Amp/h rechareable. Much cheaper, without all the useless dingers and bells.