varx/socialFound a neat site that walks you through disassembling your electric toothbrush and replacing the battery. Usually requires some soldering, but... very cool. (They're funded by selling replacement batteries!)
While disassembling my toothbrush, I came across an oddity. What are these little gray cylinders?
They're held loosely captive in a pocket of the plastic, not touching any other component. They're lightweight, rigid, non-magnetic, and maybe composed of something granular.
What the heck?
[EDIT: See rest of thread for possible answer!]
Jeff Turner ⛵@varx have you checked their radiation levels. Just seems like you checked everything else. My first guess was as balance weights but sounds like they are too light for that.
@jetsoft Not yet. 😅 If I had larger samples I'd be testing them against various solvents, with heat, etc.
And yeah, they're pretty light. Each is 55 mg, but the fully assembled toothbrush is 112 g, 1000x massier.