Lithium Ion batteries provide a consistent speed and torque from fillet to fillet, without reduced power or slow down as battery power wanes, producing 80 continuous minutes of runtime per battery without any loss of power. The Rapala Combo Pack includes a cordless knife, 2 lithium batteries, 6 & 7.5 reciprocating style blades, and wall charger, that is packed into a convenient EVA padded storage case. Comfortable, relaxed grip provides fatigue free filleting, while advanced air flow body design keeps engine running cool and smooth. Great anywhere you need a knife.