Redefining The Dive Propulsion Vehicle Market! The brand new BladeFish SeaJet 5000 Underwater Personal Propulsion Vehicle is like no underwater scooter you have ever seen before. Powered by lightweight 18 volt Lithium-Ion batteries, the BladeFish 5000 weighs in a just 10.2 pounds (batteries included) making it less than 1/3 the weight of traditional DPV's. Additionally, the nose cone typical of traditional underwater scooters has been removed making the BladeFish 5000 small enough to pack in standard checked luggage.