Editor’s note. This is the best toothbrush on the market, hands down. Its cleaning power is second to none, we love the glass charger, the fancy case and USB charger, the different brush heads and the app that tracks your brushing time and quality and gives you feedback and coaching — if you’re into that. Big thumbs up from us.
Philips Sonicare DiamondClean Smart HX9954/56 (blue). Philips’ complete-care Sonicare with four premium brush heads, Smart Sensor coaching and BrushSync mode pairing.
In the box: 1 × DiamondClean Smart handle, 4 × brush heads (1 × C3 Premium Plaque Control, 1 × G3 Premium Gum Care, 1 × W3 Premium White, 1 × TongueCare+ tongue brush), 1 × brush head holder, 1 × glass charger, 1 × USB charging travel case. Refills: G3 HX9052/96, TongueCare+ HX8072/01, W2 Optimal White HX6064/67.
Philips 90-day money-back guarantee. Philips offers a 90-day money-back guarantee on eligible NZ purchases of this model (Sonicare DiamondClean). See Philips NZ terms.
Four heads, complete care
Removes up to 10× more plaque* for a deep clean. The C3 Premium Plaque Control head’s soft flexible sides contour to each tooth.
Protects gum health. The G3 Premium Gum Care head targets the gum line — up to 7× healthier gums in two weeks.***
Remove up to 100% more stains** in just 3 days. With the W3 Premium White head.
Enjoy long-lasting fresh breath. The TongueCare+ brush’s 240 micro-bristles remove odour-causing bacteria.
Philips 90-day money-back guarantee
Philips New Zealand offers a 90-day money-back guarantee on eligible products, including the Sonicare DiamondClean (HX9954/56), bought from an NZ retail or online store between 1 Jan 2025 and 31 Dec 2026.
- How to claim: use it for at least 30 days. If you’re not satisfied, submit Philips’ online claim form within 90 days of purchase, then post the product back to Philips in its original packaging with your Claim ID.
- Key conditions: NZ residents aged 18+. Keep your receipt and the original packaging. You pay return postage, and refunds go by bank transfer in about 3–4 weeks. Accessories, trade seconds and auction-site purchases are excluded. Claims close 30 April 2027.
- Your rights under the Consumer Guarantees Act aren’t affected.
Smart Sensor coaching
Start taking better care of your trouble areas. Highlights the areas your dentist flagged on a 3D mouth map in the app.
Guides you to brush and highlights missed areas.
Guides you to reduce your scrubbing.
Alerts you if you’re pressing too hard. The light ring flashes to remind you to ease off.
Takes you back to any missed spots for 100% coverage. The app’s TouchUp feature.
Smart brush heads and modes
Brush heads automatically select the optimal settings. BrushSync mode pairing picks the mode and intensity for each head.
Make sure you’re getting the most from your brush head. Smart replacement reminders track how long and hard you’ve brushed.
Choose from 5 modes and 3 intensity settings. Clean, White+, Deep Clean+, Gum Health and TongueCare+.
Charging, home and away
Easy and stylish charging — home and away. The glass charger doubles as a rinsing glass; the USB travel case charges your brush from a laptop or wall socket. About 2 weeks per charge.
See it up close
Full specs
- Model: HX9954/56 · Philips Sonicare DiamondClean Smart · colour: blue
- Modes: Clean, White+, Deep Clean+, Gum Health, TongueCare+ · 3 intensities
- Up to 62,000 brush movements/min · BrushPacer + SmarTimer
- Smart sensors: pressure, location, scrubbing · 3D mouth map · TouchUp
- Bluetooth app connectivity · BrushSync mode pairing · replacement reminder
- Battery: lithium-ion · up to 14 days · charger 110–220V
- Warranty: 2-year limited warranty (Philips)
FAQ
Do I need the app? No — it brushes brilliantly on its own; the app adds coaching and tracking.
Which refills fit? Any Sonicare click-on head; BrushSync heads (C3, G3, W3, TongueCare+) auto-select the right mode.
*vs a manual toothbrush.
**After 3 days of use in White+ mode vs a manual toothbrush.
***In Gum Health mode vs a manual toothbrush at 2 weeks.