The Rapala Lithium Ion Cordless Fillet Knife utilizes a battery to provide a consistent speed and torque from fillet to fillet. Your battery won’t slow down as power wanes, producing 80 continuous minutes of run. This is the perfect knife for a Louisiana trout fisherman who loaded the cooler with specks. A storage case includes cordless knife, 2 Lithium Ion batteries, 6 and & 7-1/2-inch reciprocating style blades, and wall charger. This is a great knife you can use off the grid.