£209.00

PHILIPS Philips Sonicare DiamondClean Smart 9400 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9918/89

Black, HX9918/89

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Price History & Forecast

Grey patches = out of stock. Cheaper = lower on the chart. Hover for exact prices.

Last 84 days • 84 data points (No recent data available)

Historical
Generating forecast...
£449.99 £184.90 £242.74 £300.58 £358.41 £416.25 £474.09 13 March 2026 02 April 2026 23 April 2026 14 May 2026 04 June 2026

Price Distribution

Price distribution over 84 days • 8 price levels

Days at Price
Current Price
35 days · current 1 day 1 day 17 days 20 days 6 days 2 days 2 days 0 9 18 26 35 £209 £240 £255 £277 £285 £288 £295 £450 Days at Price

Price Analysis

Most common price: £209 (35 days, 41.7%)

Price range: £209 - £450

Price levels: 8 different prices over 84 days

Description

Philips Sonicare DiamondClean Smart 9400 electric toothbrush provides complete and efficient oral care, removing up to 20x more plaque¹, providing up to 15x healthier gums¹ and removing up to 100% more stains than a manual toothbrush. High-performance brush heads let you focus on all areas of your oral health, while our Smart Sensor technology gives you personalized feedback and coaching. There are 4 brushing modes: Clean mode for daily cleaning, White+ for stain removal, Gum Health for gentle but effective cleaning of the gums and Deep Clean+ for a refreshing, thorough clean. There are also 3 intensity levels to choose from. The built-in Philips Sonicare light ring pressure sensor lets you know if you’re pressing too hard. The Advanced Sonic Technology provides gentle yet effective cleaning, pulsing fluid between teeth and along the gumline with a cleaning power of 62,000 bristle movements per minute. By connecting to the Philips Sonicare app, you will be able to receive personalized brushing guidance to maintain and improve your brushing habits. The app lets you know when you’ve achieved a thorough clean and coaches you to be a better, more mindful brusher. The innovative BrushSync™ technology will let you know when it’s time to change your brush head. Improve your brushing technique with QuadPacer and reach your recommended brushing time of 2 minutes with SmarTimer. Philips Sonicare DiamondClean Smart 9400 works perfectly as a travel toothbrush thanks to the premium travel case with an integrated USB. You can also top up the power at home with the iconic charging glass. With regular use, the battery will last up to two weeks on a single charge (based on two periods of two-minute brushings per day on standard mode). ¹ vs. a manual toothbrush ² in Clean mode vs. a manual toothbrush ³ based on a study of over 2,600 dental professionals (dentists and hygienists) conducted in the United States, Canada, Japan, China, Korea, Thailand, Germany, the United Kingdom, Switzerland, France, Belgium, Austria, Italy, Spain, Sweden in 2022-2023 ⁴ after 3 days of use in White+ Mode vs a manual toothbrush using a leading whitening toothpaste ⁵ in terms of plaque removal vs. a regular manual toothbrush Packaging may vary. Safety Warning Keep out of reach of children. Do not use for purposes other than oral hygiene.

Key Features

Advanced sonic toothbrush for improved oral health: achieve up to 20x more plaque removal¹, up to 15x healthier gums¹, and remove up to 100% more stains than a manual toothbrush

Personalize your brushing with this innovative electric toothbrush for adults: choose from 4 brushing modes and 3 intensity levels to meet your oral healthcare goals

Real-time feedback: the light ring on the end of your handle will flash if you use too much pressure, so you may ease off the pressure and protect your teeth and gums

Personalized guidance: connect your toothbrush to the Philips Sonicare app and receive personalized brushing guidance to maintain and improve your brushing habits

#1 dental professional recommended sonic toothbrush brand worldwide³: benefit from Philips expertise to keep your teeth and gums in the best condition

Contains UK 2-Pin bathroom plug for use in bathrooms. Packaging may vary.

Product Specifications

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