Found 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!)
Found 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!]