Gallery of product images
Colour: Black
- Colour:
- Black
- Price
- £399.99
- 2 year guarantee included
- Free Click & Collect
- Free standard delivery
- Free returns, restrictions apply
18+, T&C apply.
Take a closer look
Information from the brandProduct description
Product code: 81500349
Whiter, healthier teeth for life. Remove up to 100% more stains*** with Philips Sonicare’s best whitening in our most elegant sonic electric toothbrush. Enjoy a stylish and user-friendly design, Simple to charge and style to boot. DiamondClean users experience improved oral health. Removes up to 20x more plaque* for a deep clean. Up to 15x healthier gums**
Always Get it Right
No need to perfect your technique with our precision balanced Philips Sonicare, designed to glide smoothly along the gum line for a gentle and effective clean. A clinically proven toothbrush you can trust. Every toothbrush and paired brush-head is clinically tested for consistent performance.
Improved teeth and gum health
Sonic technology moves the brush head with 62,000 gentle movements per minute. Innovative sonic technology removes plaque by gently pulsing fluid between the teeth and gum line.
Premium All-in-One brush head
Phillips' all-time best brush head has angled bristles to help remove up to 20x more plaque even in hard-to-reach areas*. Triangular tips work to remove up to 100% more stains in less than two days****. And longer bristles clean deep for gums that are up to 15x healthier in just two weeks**.
Premium Gum Care brush head
Click on the G3 Premium Gum Care brush head to improve your gum health. Its smaller size and targeted gum line bristles delivery gentle yet effective cleaning along the gum line, where gum disease starts. Its clinically proven to deliver up to 100% less gum inflammation**** and up to 7x healthier gums in just two weeks****.
BrushSync Mode Pairing
Smart brush heads ensure you're using the right mode and intensity for the best possible clean.
Built-in Pressure Sensor
You might not notice if you're brushing too hard, but your DiamondClean 9400 will. If you need to ease up, the toothbrush will make a pulsing sound. It's a heads up to let your brush head do the work.
Personalised brushing with 4 modes and 3 intensities
The DiamondClean 9400 comes with Clean, White+, Gum Health and Deep Clean+ to take care of your brushing needs.
BrushSync Replacement Reminder
Our BrushSync technology tracks how long you've been using your brush head for, and how hard you've been brushing. BrushSync gives you a heads up when it's time to replace it.
Long-life Battery
Your DiamondClean 9400 will last for up to two weeks on a single charge with regular use.
USB Charging Travel Case
Your deluxe USB travel case doubles as a charger so you stay topped up on the go. With a puk charger for charging easily at home.
Personalised Progress Report
A personalized Progress Report helps you stay on track, to see how much you've improved over time.
Try Philips Sonicare and if unsatisfied, simply return the product with your original receipt within 28 days of purchase to receive your money back via the Philips Website only: www.philips.co.uk/promotion
*vs a manual toothbrush
**vs a manual toothbrush in 6 weeks
***in lab test vs a manual toothbrush
**** based on two period of two-minute brushings per day on standard mode
Product specification
- Batteries Included
- Yes
- Battery Life Details
- Up to 14 hours
- Brand
- Philips
- Country of Origin
- China
- Guarantee
- 2 year guarantee included
- Model name / number
- HX9917/89
- Power Supply
- Mains, Rechargeable Battery, USB
- Timer
- No
- Voltage
- 220.00V
- Weight
- 840.00g
Delivery and returns
Delivery and collection options
- Standard Delivery
- Free
- UK delivery within 2 to 5 days, 8am - 8pm, Monday to Saturday. Free on orders over £50, otherwise £4.50.
- Click & Collect
- Free
- Free on orders over £40, £2.95 if you spend less. Choose a collection day at checkout, next day available at some locations. Available at Waitrose, selected John Lewis shops, Shell stations and Booths stores.
- Local Collection Network
- Free
- Free on orders over £40, £2.95 if you spend less. Collect your delivery from thousands of local convenience shops. Your next available collection day will show at checkout.
- Evening Delivery within London M25
- £9.95
- Order before 10am to get same day evening delivery within London M25. Available 7 days a week, delivery between 6 – 11pm on a day of your choice. We’ll text you a 1-hour delivery window on the day. Delivered by 100% electric vehicles.
- Next or Named Day Delivery
- £7.95
- Delivery on the day of your choice, 8am - 8pm, 7 days a week. You'll receive a text on the morning of delivery with a 1-hour delivery window.
- Morning Delivery
- £10.95
- Delivery on the day of your choice, by 11.30am available 7 days a week.
Returns and refunds
You can return or exchange an unwanted item within 30 days of receiving it.
Please allow up to 14 days from sending the item to receive your refund.
How to return your item
Small items
Return a small item you bought online for free to a John Lewis or Waitrose shop, or one of our return locations. You can also arrange a collection using Evri or Royal Mail.
Large items - items delivered by two people, such as appliances and furniture
We'll collect large items from you. Collections are free if your item is damaged or faulty. If not, we charge a collection fee. To arrange a collection, please contact us.