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Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Deep Pink, Model HX3681/26

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Availability: In Stock.
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Arrives Tuesday, Feb 24
Order within 9 hours and 23 minutes
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Size: 1 Count (Pack of 1)


Color: Deep Pink


Features

  • The C2 Optimal Plaque brush head with soft, flexible, stain-removal bristles helps whiten and polish your teeth; it also removes up to 700% better plaque than a manual toothbrush
  • Electric toothbrush for adults providing gentle yet effective cleaning: the Advanced Sonic Technology pulses fluid between teeth and along the gumline for even more effective oral care
  • Safe and gentle electric toothbrush with pressure sensor: if you apply too much pressure, the handle will pulse slightly, reminding you to ease off the pressure, protecting your teeth and gums
  • Optimize your routine: EasyStart for a gradual, gentle increase in brushing power, SmarTimer informing when you've reached 2 minutes, and QuadPacer to brush each section of a mouth for 30 seconds
  • Brush head replacement reminder tracks how often and how hard you brush, then notifies you when it's time to replace the brush head; dental professionals recommend changing your brush head regularly
  • Rechargeable toothbrush providing up to 14 days of regular brushing on a full charge
  • Philips Sonicare toothbrush from the #1 dental professional recommended sonic toothbrush brand worldwide2: benefit from Philips expertise to keep your teeth and gums in the best condition
  • The set includes: 1x Philips Sonicare 4100 Series electric toothbrush, 1x C2 Optimal Plaque brush head, 1x USB charger (power adaptor not included)

Description

Achieve 700% better plaque removal than with a manual toothbrush thanks to the Philips Sonicare 4100 Series sonic toothbrush paired with the C2 Optimal Plaque electric toothbrush head. Enjoy a powerful yet gentle clean, even in those hard-to-reach areas. The Advanced Sonic Technology provides gentle yet effective cleaning, pulsing fluid between teeth and along the gumline. With the built-in pressure sensor, you know when to adjust the pressure. Ease off and your gums will stay protected! To help you get used to the Sonicare experience, the EasyStart feature adjusts the power level of the toothbrush over the first 14 uses. Improve your brushing technique with QuadPacer and reach your recommended brushing time of 2 minutes with SmarTimer. Experience up to 14 days of regular brushing after a single charge, bringing a new level of convenience to your brushing routine (based on two periods of two-minute brushings per day on standard mode). Did you know that brush heads become less effective after three months? The replacement reminder tracks how often and how hard you brush, then reminds you to replace your brush head once it's time for a new one. ¹ vs. a manual toothbrush ² based on a study of over 2,600 dental professionals (dentists and hygienists) conducted in the United States, Canada, Japan, China, Korea, Thailand, Germany, the United Kingdom, Switzerland, France, Belgium, Austria, Italy, Spain, Sweden in 2022-2023

Brand: Philips Sonicare


Age Range (Description): Adult


Special Feature: Pressure Sensor,Brushing Timer,Rechargeable,Lightweight,Ergonomic


Power Source: Battery Powered


Item Firmness Description: Soft


Product Dimensions ‏ : ‎ 2.48 x 4.29 x 8.66 inches; 8.64 ounces


Item model number ‏ : ‎ HX3681/26


Batteries ‏ : ‎ 1 Lithium Ion batteries required. (included)


Date First Available ‏ : ‎ December 13, 2021


Manufacturer ‏ : ‎ Philips Sonicare


Best Sellers Rank: #176 in Health & Household (See Top 100 in Health & Household) #1 in Sonic Toothbrushes


#1 in Sonic Toothbrushes:


Customer Reviews: 4.3 4.3 out of 5 stars (52,142)


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Feb 24

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Smooth, Even Clean with Smart Features
Size: 1 Count (Pack of 1) Color: Black
After 14 years with my Oral‑B Pro 100, I decided to switch to the Philips Sonicare 4100 Rechargeable Electric Toothbrush (Model HX3681/24) when my old brush finally gave out. I’m glad I did—the Sonicare makes the surface of my teeth feel noticeably smoother and cleaner than my Oral‑B ever did. The sensation was a little strange at first, but I appreciate that the intensity gradually increases over time, which helped me adjust quickly. I also love the SmarTimer and QuadPacer features. Both brushes had 2‑minute timers, but Sonicare’s 30‑second intervals ensure I give equal attention to every section of my mouth. With my Oral‑B, I tended to spend more time on certain areas, so this is a big improvement. The lithium battery is another plus—I don’t have to swap it out nearly as often as I did with my old brush. Time will tell if it lasts as long as my Oral‑B did, but so far, I’m very impressed. Overall, this toothbrush is sleek, effective, and thoughtfully designed. Highly recommend! ... show more
Reviewed in the United States on December 3, 2025 by Steve

  • Works great
Size: 1 Count (Pack of 1) Color: White + Brush Head Case
Quality made product that works very well. Brushes my teeth well, dental hygeniest is happy with my tooth and gum health. Product is easy to use and a single charge last a really long time, using it 2x a day. Travel case for heads is nice but I use a regular toothbrush when away from the house unless overnight. ... show more
Reviewed in the United States on November 28, 2025 by Pulga

  • Way better than my other Philips toothbrush
Size: 1 Count (Pack of 1) Color: Deep Pink
I bought this to replace my Philips one electric toothbrush I lost the charger for and I wasn’t expecting much because of the price point but I liked the pink design. Well this toothbrush is so much nicer than the one toothbrush, the brush head is small so it can clean better and it has a pressure sensor that helps make it easy to use. The brush is soft but firm and the battery lasts a long time (almost a month now). ... show more
Reviewed in the United States on December 21, 2025 by Marie

  • New 4100
Size: 1 Count (Pack of 1) Color: White
I've had my first Sonicare for 9 1/2 years, and while it still works, the battery light never reaches full any more, and this is the first time I've seen them on sale, so I went for this one. I paid around $30 instead of $50 on Black Friday sale. They say they don't give you a wall plug for sustainability, which is clearly a falsehood. If they cared about sustainability, I'd be able to use my perfectly good previous wall charger. Do they honestly think we want to charge our toothbrushes from our laptops? It's ludicrous. I found a link on their website where you can request a wall charger brick. In the mean time, I'm using one I already had. Who knows if it's appropriate. I should have just stuck with my old charger. One star off for this. The toothbrush itself is fine. I picked this one because I don't think they need more than one button. It has all the features I need: timer and high or low intensity. Also the pressure sensor is a nice touch. It's thinner to hold and makes a lot less noise. I like the change for that reason alone. All my variety of Sonicare and non-Sonicare brush heads work. So far so good. We'll see if this one lasts 9 1/2 years, though. ... show more
Reviewed in the United States on November 24, 2025 by E. Raptis

  • My Teeth Have Never Felt So Clean — It’s Like a Car Wash for Your Mouth
Size: 1 Count (Pack of 1) Color: Black + Brush Head Case
This toothbrush?? A POWER TOOL. The first time I used it, my mouth was like, “Wow okay, we’re doing professional-level cleaning at home now.” First Impressions Lightweight, sleek, simple — not one of those overly complicated toothbrushes with 47 modes you’ll never use. Just one button. One mission. Make your teeth SHINE. Using It The vibration?? STRONG. Like “I didn’t know my teeth could feel THIS clean” strong. My gums were like: “Ma’am… what is this level of attention??” After the first brush: • My teeth felt smooth • My breath felt fresher • My mouth felt like it had a college degree It has a built-in timer so you stop rushing and actually brush for the dentist-recommended two minutes instead of your usual 17 seconds. Why It SLAPS • Cleans between teeth like it’s trying to expose secrets • Removes plaque like it owes you money • Still gentle on gums • Quiet enough that I don’t sound like I’m starting a lawn mower at 7AM And the vibration pattern is chef’s kiss. It pauses every 30 seconds to tell you to move to the next quadrant — which is helpful because I absolutely forget how time works. Pros • SUPER clean feeling • Easy to charge • Lightweight • Great battery life • Doesn’t have unnecessary features • Dentist-level clean at home Cons • The first time you use it, your brain might rattle slightly (you adjust fast) • It will absolutely expose how badly you used to brush Final Verdict If you want clean, smooth, dentist-approved teeth without paying $150+ for a fancy model — get this. Affordable, powerful, simple, and effective. My mouth has never felt cleaner and my dentist is going to think I got my life together. ... show more
Reviewed in the United States on November 22, 2025 by Raquel Brueggemann

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