The Stinger battery page: http://www.stingerelectronics.com/pr...edcategoryid=4
Never mind the retail price. My local customers get them much cheaper. The only problem is that the 2150 weighs in at 85 pounds. Levoy's Moomba is getting 1 of those, and 1 of the SPP925's to power the boat, ballast, and other accessories. That should be plenty of power and he'll never have to worry about shutting the stereo down.