Philips Sonicare DiamondClean 9900 Prestige

Rechargeable Toothbrush

HX9813/92
  • 20 x more plaque removal*, gentle on gums
  • No missed areas with instant coverage feedback
  • Automatically adjusts based on your brushing behaviour
  • Guides you to brush with the right pressure
£ 599.99
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20 x more plaque removal*, gentle on gums

20 x more plaque removal*, gentle on gums

Feel our best clean with the A3 All-in-One brush head. Remove 20 x more plaque, enjoy up to 15 x healthier gums in six weeks and see 100% more stain removal in less than two days versus a manual toothbrush. Enjoy a gentle yet effective clean for your teeth and gums with 62,000 bristle movements per minute.

No missed areas with instant coverage feedback

No missed areas with instant coverage feedback

The toothbrush closely follows your progress to help you clean thoroughly. The light ring at the base of the handle glows yellow when a segment of your mouth still needs attention. When it glows blue, the area is clean and you can move on to the next segment. Finished cleaning? A glance at the mouth map on the handle's display will show you any areas that need a touch-up.

Automatically adjusts based on your brushing behaviour

Automatically adjusts based on your brushing behaviour

SenseIQ Adaptive Intensity helps protect your teeth and gums by automatically adjusting to your brushing style. When Pressure + SenseIQ is activated, the toothbrush senses pressure, motion and coverage up to 100 times a second and reduces the intensity if you brush too hard.

Guides you to brush with the right pressure

Guides you to brush with the right pressure

Smart pressure feedback helps you brush with just the right pressure. During brushing, the light ring gives you instant feedback on how much pressure you are using. It glows green when you're using the right amount of pressure, pulses purple with a gentle vibration if you're pressing too hard and slowly fades to purple when you're not applying enough pressure. As a result, you get the best cleaning results while protecting your teeth and gums. At the end of your session, the handle's display shows a mouth map highlighting where you may need to adjust pressure in the future.

Brushing insights in the palm of your hand

Brushing insights in the palm of your hand

After brushing, a glance at the handle's display will show you post-brushing feedback. The mouth map indicates any areas that need a retouch as well as areas where you need to reduce pressure. It provides you with personalised brushing guidance for ultimate care - all in the palm of your hand.

Next-Generation Sonicare Technology

Next-Generation Sonicare Technology

This electric toothbrush uses our Next-Generation Sonicare Technology which delivers our most reliable and consistent brushing for excellent results every time. The motor adjusts power automatically so there is zero drop in performance when you reach those harder-to-clean areas. Sonicare Fluid Action supports the bristles to clean by driving fluid deep between the teeth and along the gumline.

Personalise your care with the interactive display

Personalise your care with the interactive display

Easily swipe to select your ideal mode, intensity and instant feedback directly using the handle's colour display. Choose between: Clean, Deep Clean, White, Gum Health, Sensitive, Max Care, Comfort and Polish modes. Plus three different brushing intensities: high, mid and low.

Experience the care you deserve every time you brush

Experience the care you deserve every time you brush

The Sonicare App, paired with your Sonicare toothbrush, feels like having a personal dental coach by your side. The app provides real-time feedback and coaching with a dynamic visual mouth map, includes tips to improve your brushing technique and tracks daily oral care routines. See your progress in a personalised dashboard. Celebrate your wins! It's a daily self-care companion that empowers you to smile with confidence.

Elevate your brushing experience

Elevate your brushing experience

The new Sonicare DiamondClean comes with a glass charger, premium finishing and an aesthetic design that elevates your brushing experience. For life on the go, the Prestige travel case doubles as a charger, ensuring that your toothbrush stays charged, wherever you go.

Keep brushing your best with the brush head replacement reminder

Keep brushing your best with the brush head replacement reminder

Did you know brush heads become less effective after three months? Dental professionals recommend changing your brush head regularly; that's why Philips Sonicare toothbrushes have a brush head replacement reminder. It tracks how often and how hard you brush, then reminds you to replace your brush head once it's time for a new one.

Intensities
High To boost your clean
Medium For an everyday clean
Low For sensitive teeth and gums
Technical specifications
Battery Rechargeable
Operating time (full to empty) 14 days
Battery type Lithium ION
OFF mode (no attachments) N/A
Low energy mode 0.06 Watts
Design and finishing
Colour Quartz Black
Service
Warranty 2-year limited warranty
Software support Philips offers relevant software updates for a period of 2 years after the date of purchase.
Compatibility
Android compatibility Android phones with Bluetooth 4.0 and above
Bluetooth wireless technology Connected Sonicare app
iOS compatibility iPhone with Bluetooth 4.0 and above
Ease of use
Battery indicator Visible on display
Handle compatibility Easy click-on brush heads
Handle Sleek and compact design
Timer BrushPacer and Smartimer
Items included
Handle 1 DiamondClean 9900 Prestige
Brush heads 1 A3 All-in-One
Travel case 1 Prestige Charging Travel Case
Charger 1 Prestige Charging Base and Glass
Cleaning performance
Plaque removal 20 x more effective*
Gum Health Up to 15 x healthier gums**
Whitening Up to 100% more stain removal***
Speed 62,000 brush movements/min
Modes
Clean For exceptional everyday cleaning
Deep Clean For an invigorating deep clean
Polish For a quick one-minute touch up
Gum Health Gently comforting your gums
Sensitive For sensitive teeth and gums
White To help remove surface stains
Max Care For an exceptional clean with added gum massage
Comfort Clean your teeth while gently massaging your gums
Power
Voltage 100-240 V
Smart sensor technology
SenseIQ Automatically adapts to you by decreasing the intensity when you press too hard
Replacement Reminder Lets you know when to replace your brush head
Smart coverage feedback Helps prevent missed spots
Smart pressure feedback Guides you to brush with the right pressure
Sonicare app
Real-time coaching Receive instant feedback on pressure, motion and coverage to improve your brushing technique as you go.
Personalised guidance Get customised brushing tips based on your brushing patterns and habits.
Progress reports Track your brushing habits and improvements over time with in-depth data and personalised insights.
Manuals and Documentation
Important information manual
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Important information manual
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Important information manual
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Important information manual
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Important information manual
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Important information manual
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Important information manual
1.3 MB Published  2026-06-18T03:36:02Z
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1.3 MB Published  2026-06-18T03:36:02Z
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1.3 MB Published  2026-06-18T03:36:02Z
Important information manual
1.3 MB Published  2026-06-18T03:36:02Z
Important information manual
1.3 MB Published  2026-06-18T03:36:02Z
Important information manual
1.3 MB Published  2026-06-18T03:36:02Z
Important information manual
1.3 MB Published  2026-06-18T03:36:02Z
Important information manual
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Important information manual
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Important information manual
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User manual
7.4 MB Published  2026-06-18T03:26:16Z
User manual
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User manual
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User manual
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