Welp, survey says: It's shrapnel. The kind that's so tiny it doesn't even show up on traditional scanning equipment. Fun times, fun times. My dream self is in the process of creating a battery alternative, because of course he's memorized old blueprints and is an engineering badass. We'll see how that goes. Maybe I'll get lucky and the dreams will send me a present.
Then I, too, can glow in the dark. Bonus: Easier for wireless charging!
Edit: I am not radioactive. The glow is part of the new battery thing. It isn't nuclear powered.