When you posted this topic Mikachu, I thought it had to do with the Gillette razor of the same name (there is a brand of Gillette shaving razors called Gillette Fusion, and one particular sub-brand called Gillette Fusion Power, which is a battery operated version).
But now that I realized it has nothing to do with that, I can tell you I am no rocket scientist. But speaking of scientists, if you know one, I suppose you could ask one that question, as I'm quite sure they'd have a better answer than what I can come up with. Sorry Mikachu.