Philips Sonicare DiamondClean Smart 9400

Sonic toothbrush
Delivered between 6.1.2026 and 22.1.2026
More than 10 pieces in stock at supplier
free shipping

Colour3

Product details

Complete care for healthy oral hygiene. Peace of mind thanks to 100% coverage. The DiamondClean Smart 9400 is our best toothbrush for comprehensive oral care. With the high-performance brush heads, you can focus on all areas of oral hygiene while our SmartSensor technology provides personalized feedback and tips.

Key specifications

Power supply
Rechargeable battery operated
Target group
Adults
Toothbrush type
Sonic toothbrush
Equipment + Functions
App supportsBluetoothBrush head change reminderCharge level indicatorCleaning coachPrint feedbackTimer
Scope of delivery
1x charging case1x charging glass1x charging station with mains plug1x handle1x USB cable2x brush heads
Battery life
336 h
Number of levels
3 x
Item number
45581215

General information

Manufacturer
Philips Sonicare
Category
Electric toothbrush
Manufacturer no.
HX9917/90
Release date
8.5.2024

Colour

Colour
Grey
Exact colour description
Grey

Electric toothbrush properties

Target group
Adults
Toothbrush type
Sonic toothbrush
Equipment + Functions
App supportsBluetoothBrush head change reminderCharge level indicatorCleaning coachPrint feedbackTimer
Cleaning programme
Daily clean
Number of levels
3 x

Sustainability

Manufacturer commitment
SBTi

Voluntary climate contribution

CO₂-Emission
Climate contribution

Power supply

Power supply
Rechargeable battery operated

Battery properties

Battery life
336 h
Charging variant
Charging station
Battery type
Li-ion
Battery size
Device specific

Mains operation Features

Mains voltage
220 V

Scope of delivery

Scope of delivery
1x charging case1x charging glass1x charging station with mains plug1x handle1x USB cable2x brush heads

Package dimensions

Length
26 cm
Width
17.70 cm
Height
12 cm
Weight
1.06 kg

30-day right of return if unopened
24 Months Warranty (Bring-in)

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Electric toothbrush» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 17.Oclean
    4.3 %
  • 18.Fairywill
    4.4 %
  • 19.Philips Sonicare
    4.5 %
  • 20.happybrush
    5.4 %
  • 21.Waterpik
    5.7 %

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: Digitec Galaxus
  • 8.Trisa
    1 day
  • 10.Oral-B
    2 days
  • 10.Philips Sonicare
    2 days
  • 12.Emmi-dent
    6 days
  • 13.Silk'n
    11 days

Return rate

How often is a product of this brand in the «Electric toothbrush» category returned?

Source: Digitec Galaxus
  • 8.Nuvita
    0.6 %
  • 11.happybrush
    0.7 %
  • 11.Philips Sonicare
    0.7 %
  • 13.Silk'n
    0.8 %
  • 14.Trisa
    0.9 %
Source: Digitec Galaxus

Translation: machine translated
Overall ratingVery good86/100
Very good89/100
Haus & Garten Test Logo
Rank 2 out of 14Haus & Garten Test14 elektrische Zahnbürsten im TestReleaseFebruary 2025

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 (Sonic toothbrush)
Very good83/100
Rank 1 out of 12Stiftung WarentestElektrische Zahnbürsten im Test - Von Luxus bis SchnäppchenReleaseJanuary 2023

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...