Philips Sonicare Electric Toothbrush DiamondClean 9400 - Black - HX9917/89

The DiamondClean Smart 9400 is our best toothbrush, for complete care. Four high-performance brush...

Best current price£204.99from Philips UKI

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Philips UKISonicare Philips Diamondclean Smart 9400 - Sonic Electric Toothbrush + 2 Accessories And App - Hx9917/89
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£204.99
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Product Information

Full details

The Philips Sonicare DiamondClean Smart 9400 is an advanced sonic toothbrush designed for adults seeking superior oral care. It offers up to 20x more plaque removal and up to 15x healthier gums. A key feature is its personalized brushing guidance via the Philips Sonicare app, though this requires consistent use and a compatible smartphone. The DiamondClean Smart 9400 features multiple brushing modes and intensity settings, making it a versatile tool for maintaining and improving your oral hygiene.

All features

ColourBlack
SeriesDiamondClean Smart
Model Part NumberHX9917/89
BrandPhilips

Extended Product Information

FAQs

How do I clean the toothbrush?

Rinse the brush head and handle thoroughly after each use. Detach the brush head and clean both parts separately. Wipe the charging glass and travel case with a damp cloth.

How often should I replace the brush head?

Replace the brush head every three months, or sooner if the bristles become worn or frayed.

What happens if I brush too hard?

The pressure sensor will activate, and the light ring on the end of the handle will flash, alerting you to ease off the pressure to protect your teeth and gums.

Can I use any toothpaste?

Yes, you can use any toothpaste with the Philips Sonicare DiamondClean Smart 9400.

Is the toothbrush waterproof?

Yes, the toothbrush is waterproof and can be used in the shower.

What is the battery life?

The toothbrush has a battery life of up to 336 hours.

What is included in the box?

The set includes: 1 x DiamondClean Smart 9400 sonic electric toothbrush, 1 x A3 Premium All-in-One brush head, 1 x G3 Premium Gum Care brush head, 1 x charging glass, 1 x USB charging travel case and a UK 2-Pin bathroom plug.

Troubleshooting

Toothbrush not turning on.

Ensure the toothbrush is charged. Place the handle in the charging glass or travel case and wait for it to fully charge. Check the power outlet if the toothbrush does not charge.

Bluetooth connection issues with the app.

Ensure Bluetooth is enabled on your smartphone and that the app is updated. Restart the app and the toothbrush. Make sure your phone is near the toothbrush during pairing.

Brush head not fitting properly.

Ensure you are using a compatible Philips Sonicare brush head. Align the brush head with the handle and press firmly until it clicks into place.

Toothbrush not charging.

Make sure the charging glass or travel case is connected to a power source. Clean the charging contacts on both the handle and charger.

Weak Performance

Ensure the brush head is not worn out, and consider changing the brush head. Ensure the brush head is placed properly.

Pros and Cons

Pros

  • Superior plaque removal for improved oral health.
  • Personalized brushing guidance helps improve technique.
  • Multiple modes and intensity settings for customized care.
  • Pressure sensor protects gums from damage.
  • Long battery life ensures fewer recharges.
  • Comes with a travel case for convenience.

Cons

  • Requires the Philips Sonicare app for full functionality.
  • App features require a compatible smartphone.
  • May take time to adjust to the sonic vibrations.
  • Replacement brush heads add to the long-term cost.
  • Charging glass requires counter space.
  • Initial setup and pairing with the app can be time-consuming.

Setup, Compatibility & Care

  1. Charging: Place the toothbrush handle in the charging glass or the USB charging travel case. The charging indicator will blink to show it's charging.
  2. App Pairing: Download the Philips Sonicare app and follow the in-app instructions to connect your toothbrush via Bluetooth. Ensure your smartphone is compatible (check the app store for details).
  3. Brush Head Attachment: Firmly push the brush head onto the handle until it clicks.
  4. Brushing: Apply toothpaste and gently guide the brush along your teeth, using the chosen mode and intensity. The built-in timer will guide you through the recommended 2-minute brushing time.
  5. Cleaning: Rinse the brush head and handle thoroughly after each use. Detach the brush head and clean both parts separately. The charging glass and travel case can be wiped with a damp cloth.

Compatibility

The DiamondClean Smart 9400 is compatible with various Philips Sonicare brush heads, including the A3 Premium All-in-One and G3 Premium Gum Care heads included in the set.

Care Instructions

  • Replace brush heads every three months, or sooner if the bristles become worn.
  • Avoid using abrasive cleaners on the handle.
  • Store the toothbrush in a dry place.

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