Offering power, performance, and craftsmanship, this reliable fillet knife now comes with a built-in lithium/ion battery that provides continuous, full-power operation for up to 80 minutes without any reduction or hesitation as the power trickles down. A comfortable, relaxed grip delivers fatigue-free filleting, while the advanced, air flow body design keeps the knifes powerful, long-lasting engine running smooth and cool. Includes a 7" reciprocating-style blade and charger.