The risks are low you'll be turned into a frog. On the bright side, if you are turned into a frog I happen to know some very attractive royals from a fucked up fairytale kingdom so you should be good.
In all seriousness, I don't want to sugarcoat this. The metamath adds up so it should work. That doesn't mean that there isn't risk.
My best guess? I didn't calculate the battery size and so the power isn't stored properly and leaks. Or I end up wiping out all of my magical power instead of just the what. I still want to go through with this.