I have been cleaning with such a brush since 2022 (with 5 modes), and only this year it failed - the rubberized case cracked and failed, before that I replaced the battery only about six months or a year ago. This is very pleased (12 years of operation without breakdowns and some other troubles). In the new brush, for the most part, the only changes are in connecting the phone to it. It seems like a trifle, but it seems that they have become cleaner than usual. In any case, now there is an understanding of where you clean correctly, and where you violate the safety rules of enamel or cheat. The question of choosing which manufacturer's brush to buy was not, in principle. I chose only the model and the number of modes (already used to my 5 and did not want less).
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