The Philips Sonicare DiamondClean 9400 electric sonic toothbrush with app HX9917/88 ensures whiter teeth and improves oral health at the same time. Thanks to the A3Premium all-in-one brush head with angled bristles, it enables thorough removal of plaque, even in hard-to-reach areas. Thanks to its triangular tips, the sonic toothbrush also removes discolouration for a radiant smile. With four brushing programmes and three intensity levels, it offers a personalised brushing experience. To prevent excessive pressure, the Philips Sonicare DiamondClean 9400 has a pressure sensor.
All-in-one brush head for comprehensive care.
Brush as you always do - 20 times more effective with the A3 brush head and 10 times more effective with the brush head compared to a manual toothbrush.
Up to 7 times healthier gums in just 2 weeks.
Customise the DiamondClean 9400 to your needs.
BrushSync technology automatically selects the best brushing programme for you and alerts you if you press too hard.
Scope of delivery: 1x HX9917/88, 1x All-in-1 Premium Brush Head, 1x Premium Gum Care, 1x Charging Glass, 1x USB Travel Charging Case.
Power supply | Rechargeable battery operated |
Target group | Adults |
Toothbrush type | Sonic toothbrush |
Equipment + Functions | App supports, Bluetooth, Brush head change reminder, Charge level indicator, Display, Print feedback, Timer |
Scope of delivery | 1x charging case, 1x charging glass, 1x charging station with mains plug, 1x handle, 1x USB cable, 2x brush heads |
Battery life | 336 h |
Number of levels | 4 x |
Item number | 18233310 |
Manufacturer | Philips Sonicare |
Category | Electric toothbrush |
Manufacturer no. | HX9917/88 |
Release date | 3.8.2021 |
Sales rank in Category Electric toothbrush | 94 of 949 |
May include power adapter | No |
Colour | White |
Exact colour description | White |
Target group | Adults |
Toothbrush type | Sonic toothbrush |
Equipment + Functions | App supports, Bluetooth, Brush head change reminder, Charge level indicator, Display, Print feedback, Timer |
Cleaning programme | Daily clean, Deep clean, Gum massage, Whitening |
Number of levels | 4 x |
Country of origin | China |
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 |
Power supply | Rechargeable battery operated |
Battery life | 336 h |
Charging variant | Travel pouch |
Battery type | Li-ion |
Battery size | Device specific |
Mains voltage | 220 V |
Scope of delivery | 1x charging case, 1x charging glass, 1x charging station with mains plug, 1x handle, 1x USB cable, 2x brush heads |
Length | 17 cm |
Width | 11 cm |
Height | 25.50 cm |
Length | 25.70 cm |
Width | 19.20 cm |
Height | 11 cm |
Weight | 1.05 kg |
| URL | https://www.philips.ch/c-w/aktionen/GZG.html |
| Valid from | 6.11.2024 |
| Ends | 31.12.2025 |
| Closing date | 31.12.2025 |
How often does a product of this brand in the «Electric toothbrush» category have a defect within the first 24 months?
Source: Digitec 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: Digitec GalaxusHow often is a product of this brand in the «Electric toothbrush» category returned?
Source: Digitec 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...
