Philips Sonicare DiamondClean Smart 9400 HX9917/89 Sonic electric toothbrush with app

Sonic toothbrush
Price in EUR including VAT
184Ratings
BrandMore from Philips Sonicare
Test reportsVery good based on 2 tests
Delivered Mon, 7-4
Only 2 items in stock
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Colour

Product details

Easy and stylish charging - home and awayBrush heads automatically select the optimal settingsGuides you to reduce your scrubbingAlerts you if you're pressing too hardStart taking better care of your trouble areasMake sure you're getting the most from your brush headTakes you back to any missed spots for 100% coverageGuides you to brush and highlights missed areasChoose from 4 modes and 3 intensity settingsRemoves up to 10x more plaque* for a deep clean.

Key specifications

Target group
Adults
Number of levels
4 x
Power supply
Rechargeable battery operated
Battery life
336 h
Exact colour description
Black
Toothbrush type
Sonic toothbrush
Item number
18233309

General information

Manufacturer
Category
Manufacturer no.
HX9917/89
Release date
3.8.2021

Colour

Colour
Black
Exact colour description
Black

Electric toothbrush properties

Target group
Adults
Toothbrush type
Sonic toothbrush
Equipment and equipment
Timer
Cleaning programme
Daily clean, 
Deep clean, 
Gum massage, 
Whitening
Number of levels
4 x

Origin

Country of origin
Germany

Sustainability

Manufacturer commitment
RE100, 
SBTi

Model

Model number
HX9917/89

Power supply

Power supply
Rechargeable battery operated

Battery properties

Battery type
Li-ion
Battery size
Device specific
Battery life
336 h

Scope of delivery

Items per sales unit
1 x
Number of brush heads
2 x
Scope of delivery
1 x Sonicare Diamond Clean Smart 9400, 
1x charging glass, 
1x handle, 
1x USB travel charging case, 
2x brush heads (A3 Premium All-in-One and G3 Premium Gum Care)

Product dimensions

Length
11 cm
Width
17 cm
Height
25.50 cm
Weight
1053 g

Package dimensions

Length
26.20 cm
Width
18 cm
Height
12.20 cm
Weight
1.06 kg

Legal Notice

Product Safety

14-day cancellation right
30-day right of return if unopenedReturn policy
24 Months Statutory warrantyGuarantee provisions

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.Fairywill
    2,7 %
  • 10.Oclean
    3,7 %
  • 11.Philips Sonicare
    4,1 %
  • 12.happybrush
    4,3 %
  • 13.Ailoria
    6 %

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.Braun
    2 days
  • 7.Oral-B
    2 days
  • 7.Philips Sonicare
    2 days
  • 10.Curaprox
    3 days
  • 10.Oclean
    3 days

Return rate

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

Source: Galaxus
  • 1.Fairywill
    0,4 %
  • 1.Innogio
    0,4 %
  • 5.Philips Sonicare
    0,6 %
  • 6.Ailoria
    0,8 %
  • 7.Laifen
    0,9 %
Source: 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.

Go to complete test report
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...