I got an oral b toothbrush (primary selling point for me, was the pressure sensor that alerts you if you’re pressing too hard against your teeth, I think I paid around €150 for it back then), well over 8 years ago, and it’s still going strong. The battery still easily holds a week’s charge too, which is great for holidays
I can’t go to sleep if I don’t set an alarm, due to worrying about oversleeping lol