- The Voopoo Rex Kit features the innovative Rex machine (actually vape, but it sounds good). The Rex delivers a durable, ergonomic grip with style and fast action. With its amazingly fast firing speed, it provides big clouds in a big way. It powers up to 80 watts and includes a powerful magnetic battery cover made by GE. The tank contains the next-gen 510 thread, created by Voopoo themselves, which is designed to prevent deadlock and liquid leaks. Tank capacity is 5ml and accepts your favorite nic-salts with the pre-installed UFORCE U2 0.4ohm dual coil (40-80W) or the additionally included UFORCE N1 0.13ohm mesh coil (50-100W).