[TurkishPoptart]

I think this is what I'm going to do. It seems to be an excellent toothbrush, aside from the app business.

[freeflight]

Or just look into the older "dumb" versions of them. My Sonicare HX690 is by now over a decade old and still working perfectly fine.

[totalZero]

They have some dumb versions available currently too. My understanding is that the same motor assembly from the higher end models is used in the 4100. You lose some unimportant customizable features, but you still get the 30sec pulses and 2min off time.