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Philips
Philips Sonicare 3100 Series Electric Toothbrush - Sonic Toothbrush with Pressure Sensor, 3 Intensity Levels, EasyStart, SmarTimer, Travel Case, White, HX4033/21
The new-generation Sonicare 3100 (HX4033/21): a sonic brush with High, Medium and Low intensities, Easy Start, a pressure sensor that vibrates to warn you, a 2-minute SmarTimer with 30-second prompts and up to 14 days of battery. Philips lists a USB charger and a travel case in the box.
Updated October 10, 2026
- Sonic brush; the listing quotes 31,000 bristle movements.
- Three intensity settings: High, Medium and Low.
- Easy Start builds power gradually over the first 14 cleans (listing).
- Pressure sensor: gentle vibrations tell you to ease off.
- SmarTimer for 2 minutes and a prompt every 30 seconds.
- Up to 14 days per charge; USB charger, travel case and W Optimal White head in the box (Philips UK).
Good for
People who prefer a sonic brush, like 30-second prompts and want USB charging.
Skip it if
Anyone who wants the longest battery life or a visible pressure light.
Our take
On this page
Our verdict
The HX4033/21 is the current, new-generation Sonicare 3100 and a good fit if you want a sonic brush that eases you in. Easy Start ramps the power up over your first 14 cleans, three intensities let you turn it down for sensitive gums, and a prompt every 30 seconds helps you split the 2 minutes evenly. The pressure sensor warns you by vibrating the handle. Skip it if long battery life matters most; Philips lists up to 14 days. The variant trap: older 3100 listings (HX3671) are the previous design, and HX4034 or two-pack HX4072 listings are colour or bundle versions, so check the model number.
Charging and heads
Philips UK lists a USB charger in the box, which helps if your bathroom has no shaver socket; check whether you need a USB wall plug. It uses Sonicare click-on heads, and the box includes a W Optimal White head. The "up to 5x" plaque figure is Philips' claim against a manual brush.
FAQ
Is this the same as the older Sonicare 3100?
No. Philips UK lists HX4033/21 as a current 3100 model with three intensities and Easy Start; the HX3671 is listed for support only.
Does it remind me to move around my mouth?
Yes. Philips lists QuadPacer (the listing calls it BrushPacer) every 30 seconds.
How we researched this
We read Philips UK's specification for HX4033/21 and checked the Amazon.co.uk listing on 2026-10-10. We did not test the brush.
