Philips Sonicare DiamondClean Smart 9400
Sonic toothbrushCurrently out of stock
Product details
Experience the deepest clean with the Philips Sonicare DiamondClean Smart Series 9400. The all-in-one premium brush head adapts perfectly to your teeth and removes up to 20 times more plaque in hard-to-reach areas compared to a manual toothbrush. The three intensity levels and four brushing modes - "Clean," "White+," "Deep Clean+," and "Gum Health" - cover all your oral care needs. The Philips Sonicare app shows how thoroughly you are brushing and provides personalized tips, such as the TouchUp feature that helps you brush missed spots. The smart brush head recognition automatically reminds you to replace the brush head based on usage time and pressure. The pressure sensor alerts you when you are brushing too hard, and seven out of ten users improved their brushing habits thanks to this feature. An integrated scrub sensor ensures that no harmful movements are made, thus improving your technique. Optimize your oral care with the Philips Sonicare DiamondClean Smart and cutting-edge technology.
Advanced sonic toothbrush for improved oral health: removes up to 20 times more plaque compared to a manual toothbrush, up to 15 times healthier gums, and up to 100 percent fewer stains.
Personalized settings - four modes: Clean, White+, Gum Health, DeepClean+; with three intensity levels.
Real-time feedback: The light ring at the end of your handle flashes when too much pressure is applied, and the vibration of your handle decreases. This keeps your teeth and gums protected.
Smart app features: Connect your toothbrush to the Philips Sonicare app and receive personalized cleaning feedback.
Included: 1x DiamondClean Smart electric toothbrush, 4x All-in-One premium brush heads, 1x USB travel charging case, 1x charging glass.
Target group | Adults |
Number of levels | 3 x |
Power supply | Rechargeable battery operated |
Battery life | 336 h |
Exact colour description | Black |
Toothbrush type | Sonic toothbrush |
Item number | 46909879 |
Manufacturer | Philips Sonicare |
Category | Electric toothbrush |
Manufacturer no. | HX9918/89 |
Release date | 26/8/2024 |
Colour | Black |
Exact colour description | Black |
Target group | Adults |
Toothbrush type | Sonic toothbrush |
Equipment and equipment | App support, Bluetooth, Brush change display, Pressure sensor, Timer |
Cleaning programme | Daily clean, Deep clean, Gum massage, Whitening |
Number of levels | 3 x |
Country of origin | China |
Manufacturer commitment | SBTi |
CO₂-Emission | |
Climate contribution |
Model number | 89, HX9918 |
Power supply | Rechargeable battery operated |
Battery type | Li-ion |
Battery size | Device specific |
Battery life | 336 h |
Items per sales unit | 1 x |
Number of brush heads | 4 x |
Scope of delivery | 1x charging glass, 1x DiamondClean Smart electric toothbrush, 1x USB travel charging case, 4x All-in-One Premium brush head |
Length | 11.13 cm |
Width | 17 cm |
Height | 2.53 cm |
Weight | 846 g |
Length | 25.90 cm |
Width | 18 cm |
Height | 11.80 cm |
Weight | 1.07 kg |
Product Safety |
Specifications may include unverified machine translations.
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Reviews & Ratings
Statutory warranty score
How often does a product of this brand in the «Electric toothbrush» category have a defect within the first 24 months?
Source: Galaxus- 9.Fairywill3.2 %
- 10.Oclean3.8 %
- 11.Philips Sonicare4 %
- 12.happybrush4.5 %
- 13.Ailoria5.8 %
Statutory warranty case duration
How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?
Source: Galaxus- 7.Xiaomi1 day
- 8.Oral-B2 days
- 8.Philips Sonicare2 days
- 10.Braun3 days
- 10.Curaprox3 days
Return rate
How often is a product of this brand in the «Electric toothbrush» category returned?
Source: Galaxus- 2.Fairywill0.4 %
- 2.Innogio0.4 %
- 5.Philips Sonicare0.6 %
- 6.Ailoria0.8 %
- 7.Laifen0.9 %
Source: Galaxus
Translation: machine translated
Overall ratingVery good86/100
Very good89/100

The Sonicare app shows whether the cleaning was thorough. With the all-in-one premium brush head, the bristles achieve up to four times more surface contact. The four modes and three intensity levels cover the high care requirements of teeth.
This test report belongs to a different type: DiamondClean Smart 9400 HX9917/89 Sonic electric toothbrush with app (Sonic toothbrush)
Very good83/100
Good all round. The rather expensive brush convinces in all areas. It cleans the teeth well and offers a respectable battery life of 117 minutes. The optical pressure control warns of strong pressure on teeth and gums. Four different cleaning settings, each with three different intensity levels, can be selected...