[PescadorPete]

You want to use high capacity NiMH AA cells. You'll need 10 cells to get 12 volts. Here is how I do it. The batteries are 2.6 amp hours so they last a long time.

http://www.norcalkayakanglers.com/index.php?page=19

http://www.all-battery.com/t-698810c...ries--new.aspx