Bubba Lithium Ion Cordless Fillet Knife SetLithium Ion Cordless Fillet Knife You asked for it, and Bubba delivered. This Lithium Ion Cordless Electric Fillet Knife is ergonomically designed to fit perfectly in your hand. Bubba has stayed true to their roots by incorporating the iconic non slip grip handle, which allows you to cut through fish like butter. Their lithium ion battery has the longest run time of any electric fillet knife on the market, so you can stack fillets until you're out of