How To Fix A Dead Toothbrush. Then, take a fully charged battery (of the same type) and your “dead” battery and hold the two negative ends so they are touching. No more vibrations, no more toothbrush.
The only way to be sure is to test it with another compatible charger. If the single dark tooth is the result of trauma the staining is caused by saturation of iron from the bloodstream during periods of inflammation. Just keep in mind that accessing them does require a patient and meticulous approach.
Installing a new battery is going to be a quirky soldering project for a future weekend, but it’s not a particularly tricky job.
If the single dark tooth is the result of trauma the staining is caused by saturation of iron from the bloodstream during periods of inflammation. It needed to be removed to disassemble the toothbrush. The photos below show the top and bottom of the toothbrush internals. Match the bars that are on the inside top of the removable nut with the notches inside the top of the handle and slide the brush head onto the handle.