Had a 16' Peregrine a few years ago. First ran my minkota off one of those battery boosters. Not bad if you didn't have too far to go. Then I got smart and picked up a lawn tractor battery - worked much better. Put it in the cuddy and ran permanent wiring under the seats to the stern. Installed a plug there and had the mate to it on a short line to the minkota. Could just unplug it and pop it in the cuddy or take it home. Had a solar panel that also plugged in like the minkota to keep the battery as charged as possible. My motor was only 30 lbs thrust and in windy condions was a little under powered.
Hope this helps.