[oasisaimlessly]

> [We] can see that the tag is configured to permanently disable all write access after three wrong password attempts. (Which I promptly exceeded when playing around) This means that not even the toothbrush handle itself can write to this head again.

[lights0123]

It didn't mention that the toothbrush failed to keep vibrating, just that the toothbrush head lost its function as a writable NFC tag.

[tgsovlerkhgsel]

What happens in that case? Does the toothbrush misbehave/consider the brush beyond its lifespan, or is it a convenient way to disable this feature?

[pests]

Just disable the feature the way the manufacture instructs instead of this random hacking? Why pull out all the engineering tools when the step by step is in the manual?