My Philips Sonicare electric toothbrush is still going strong. It's over 10 years old and still works just as well as when I first bought it. I bring it on week long
Philips Sonicare HX6710 teardown and repair | KuzyaTech
The Best Electric Toothbrush for 2022 | Reviews by Wirecutter
Review: Philips DiamondClean Smart Brush Toothbrush — Is It Worth the Cost?