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.
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 |
Manufacturer | Philips Sonicare |
Category | Electric toothbrush |
Manufacturer no. | HX9917/89 |
Release date | 3/8/2021 |
Colour | Black |
Exact colour description | Black |
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 |
Country of origin | Germany |
Manufacturer commitment | RE100, SBTi |
Manufacturer compensation | According to RE100, the manufacturer Philips Sonicare fully compensates for its energy consumption, leading to a reduction in emissions. |
CO₂-Emission | |
Climate contribution |
Model number | HX9917/89 |
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 | 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) |
Length | 11 cm |
Width | 17 cm |
Height | 25.50 cm |
Weight | 1053 g |
Length | 26.20 cm |
Width | 18 cm |
Height | 12.20 cm |
Weight | 1.06 kg |
Product Safety |
How often does a product of this brand in the «Electric toothbrush» category have a defect within the first 24 months?
Source: GalaxusHow 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: GalaxusHow often is a product of this brand in the «Electric toothbrush» category returned?
Source: Galaxus
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.
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...
