Based on 9 r/BuyItForLife mentions

Philips Electric Toothbrush Sonicare DiamondClean Smart

$199.99

Sonicare

Experience unparalleled oral care with the Philips Sonicare DiamondClean Smart Electric Toothbrush, model HX9903/15. This revolutionary device combines cutting-edge Sonic technology with a sleek black design to elevate your daily brushing routine. Designed for complete oral hygiene, the DiamondClean Smart delivers up to 10x more plaque removal and 100% more stain removal in just three days, ensuring your smile is bright and healthy. With four customizable brushing modes and three intensity settings, you can tailor your cleaning experience to match your unique needs. The built-in pressure sensor alerts you if you're brushing too hard, protecting your gums while improving overall gum health up…

Reddit mentions

  • “HX9368/35 (Sonicare Diamond Clean), purchased 2018. 2020 I was concerned about the seal flaws, so I purchased a new designed seal from eBay, a UK seller. Fitted it. Haven't had any…”
  • “I had my original Sonicare diamondclean for over 10 years before I had to replace it. Definitely recommended!! My parents bought a cheaper Sonicare and needed to replace more…”
  • “Amazing we have had the exact thing happened. Our replacement is acting up, luckily still under warranty .  We have lost faith in the bifl of this formerly stellar toothbrush.”
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Product details
Product Type
Electric Toothbrush
Subtype
Sonic, Electric toothbrush
Replaceable Head
Yes
Head Size
Standard
Included Accessories
Travel case
Supported Accessories
Easy click-on brush heads
Highlighted Features
Smart Sensor technology
Mechanism Type
Sonic
Age Group
Adult
Body Part Use
Teeth, Gums
Use Case
Daily cleaning
Target Users
iPhone with Bluetooth 4.0 and above users, Android phones with Bluetooth 4.0 and above users
Specific Dental Concerns
Whitening, Gum health, Plaque removal
Bristle Type
Medium, Firm, Soft
Bristle Material
Nylon
Rechargeable Battery
Yes
Battery Life
14 days (full to empty)
Battery Type
Lithium-ion
Disposable
No
Water Resistance
Fully Washable
Power Source
Rechargeable Battery
Voltage
100-240 V
Grip
Ergonomic
Handle Material
ABS Plastic
Head Shape
Oval
Travel Features
Travel case
Motor Speed
62,000 brush movements / min
Motor Power Output
3 W
Replacement Head Compatibility
Easy click-on brush heads
App Connectivity
Yes
Bluetooth
Yes
Overall Dimensions
10 IN (depth)