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Philips Sonicare DiamondClean Smart 9300 Electric Toothbrush, Sonic Toothbrush with App, Pressure Sensor, Brush Head Detection, 4 Brushing Modes and 3 Intensity Levels, Black, Model HX9903/15
- Advanced sonic toothbrush for improved oral health: up to 20x more plaque removal vs. a manual toothbrush, up to 15x healthier gums¹, and up to 100% less stains
- Personalize your brushing with this innovative electric toothbrush: 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, reminding you to 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
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Warranty & Returns
Warranty, Returns, And Additional Information
Warranty
- Limited Warranty period (parts): 2 years
- Limited Warranty period (labor): 2 years
- Read full details
Return Policies
- Return for refund until: January 31, 2027
- Return for replacement until: January 31, 2027
- This item is covered by Newegg.com's Extended Holiday Return Policy.
- Read full return policy for details.
We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1st, 2026 and December 31, 2026 you will have until January 31, 2027 to return your product.
Manufacturer Contact Info
- Manufacturer Product Page
- Manufacturer Website
- Support Phone: 1-800-682-7664
- Support Website
- View other products from Sonicare
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The Philips Sonicare DiamondClean Smart 9300 (HX9903/15) is a rechargeable sonic electric toothbrush with four brushing modes, three intensity levels, a pressure sensor, and app-based coaching, suited to people who want personalized feedback to build a more thorough brushing routine.
Recommended For
- People working on brushing technique who want feedback while they brush: the pressure sensor provides a visible alert, and the app can track pressure, motion, and coverage.
- People who want to tailor brushing to different needs, such as using a gentler setting for sensitive teeth and gums or a separate mode for surface stains.
- Frequent travelers who want a rechargeable brush with a protective travel case and a stated battery runtime of up to 14 days between charges.
- Sonicare users who want a more guided routine but still want to brush without opening the app; the handle also has a timer, pacing, pressure feedback, and brush-head replacement reminders.
Real-World Use Scenarios
- When building a more even brushing routine, use the app’s guidance and session feedback to notice areas you tend to miss and spend more attention there during future brushes.
- If you tend to brush too hard, the handle’s light-ring alert gives you a cue to ease your pressure while brushing, which can help you practice a gentler technique.
- For a regular morning or evening clean, the timer and pacing cues help divide brushing time across the mouth, while Clean mode is suited to everyday use.
- When gums or teeth feel sensitive, choose a lower intensity or Gum Health mode for a gentler-feeling session; this is an adjustable brushing option, not treatment for a dental condition.
- If you want to address surface staining from everyday foods and drinks, White+ mode is intended for that brushing goal; results depend on the cause and extent of staining.
- For trips, pack the handle and brush heads in the included travel case; the case protects them in a bag, but the 9300 case does not charge the toothbrush.
Spec Summary
| Attribute | Value |
|---|---|
| Best For | Adults seeking app-guided sonic brushing with adjustable cleaning modes, brushing feedback, and included brush heads |
| Brushing Modes And Feedback | Electric sonic brushing at up to 62,000 brush movements per minute, with 4 modes, 3 intensity levels, BrushPacer and SmarTimer, and a pressure sensor with light-ring feedback |
| App Guidance And Brush Head Reminders | The Philips Sonicare app offers brushing guidance, missed-spot feedback, and help with trouble areas; BrushSync can remind you when a brush head is due for replacement |
| Brush Heads And Included Accessories | Includes Premium Plaque Control, Premium Gum Care, and Premium White brush heads, a glass charger, and a premium travel case; brush heads are diamond-shaped with soft nylon bristles |
| Power And Charging | Rechargeable, with a lithium-ion battery included and installed; listed power source is 110–220 V |
| Design And Materials | Black toothbrush with a plastic handle |
| Physical Specifications | Listed dimensions: 11.1 × 17.4 × 25.2 cm; item weight: 2.31 lb |
| Safety And Use | Not suitable for children under 3; do not submerge the handle, and use only with compatible Philips Sonicare chargers |
| Model Identifiers | Sonicare DiamondClean Smart electric toothbrush, model HX9903/15 |