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Philips Sonicare

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: Only 3 left in stock, order soon!
Fulfilled by Amazon
Arrives Monday, May 11
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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

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: 4.4 4.4 out of 5 stars (13,837)


Brand Name: Philips Sonicare


Age Range Description: Adult


Included Components: 1 Philips Sonicare 4100 handle, 1 Optimal Plaque Control (C2) brush head, 1 charger


Model Name: 4100 Series


Target Audience: Unisex-Adults


Package Type Name: Box


Global Trade Identification Number: 71


Manufacturer: Philips Sonicare


UPC: 075020100771


Manufacturer Part Number: HX3681/26


Model Number: HX3681/26


Other Special Features of the Product: Pressure Sensor,Brushing Timer,Rechargeable,Lightweight,Ergonomic


Power Source: Battery Powered


Item Firmness Description: Soft


Toothbrush Head Shape: Round


Operation Mode: Automatic


Number of settings: 2


Reusability: Reusable


Mount Motion: Vibrate


Number of Items: 1


Unit Count: 1 Count


Number of Pieces: 1


Item Dimensions: 2.48 x 4.29 x 8.66 inches


Item Weight: 0.54 Pounds


Material Features: Reusable


Bristle Material: Nylon


Handle Material: Plastic


Color: Deep Pink


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, May 11

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

    • Best Electic Toothbrush You Can Get
Size: 1 Count (Pack of 1) Color: Deep Pink
The media could not be loaded. My dentist told me that I needed to switch to an electric toothbrush so I found the specs and review to this one to be good. The brush head isn't too small like the other ones I saw, and it has two power speeds. It may be uncomfortable to use on your teeth at first if you switch from a manual toothbrush. But let me tell you, that your teeth will get so much used to it and after a while, it won't even bother you. I find that my teeth are just as clean as if coming from a dentist's office. My teeth feel so smooth and I can tell that it has gotten rid of any plaque or bacteria I may have. I have permanent retainers on the bottom of my teeth which can be a pain to clean and floss. But with this electric toothbrush, I can tell that it's cleaner than it has ever been as I glide my tongue around the area. I just visited the dentist and the hygienist was going about how clean my teeth are and how well I take care of them! And how I have absolutely no plaque, and I am doing the right things, and that I should keep doing what I'm doing. I was using a battery-powered brush that was cheap from Walmart but having to replace the batteries is a hassle. The fact that this is rechargeable and the change holds for a VERY long time is what I think is the best thing about this toothbrush. It may not come with a wall adapter, but you can contact Sonicare and they can send one in for you to use. Their idea is to conserve the environment by doing so which is fine by me. I just used a wall charger I've had and it does the job. If you're on the fence about buying this one, or any electric toothbrush-don't be. Its the best investment you can make for yourself and your oral health and I have not looked back on buying this. 10/10 recommend. ... show more
Reviewed in the United States on October 20, 2023 by Megan
    • Quit sending me notifications to rate products
Size: 1 Count (Pack of 1) Color: Deep Pink
Works a little different from previous iterations but still a good electric toothbrush
Reviewed in the United States on April 2, 2026 by Aaryck
    • Excellent performance, but would love more color variety!
Size: 1 Count (Pack of 1) Color: Deep Pink
I am so impressed with the Philips Sonicare 4100 Series. I purchased the Deep Pink and Light Pink versions, and they look great in the bathroom. The advanced sonic technology leaves my teeth feeling incredibly clean, and the pressure sensor is a great feature to ensure I’m not brushing too hard. My only wish is that this series came in a wider range of colors. It would be so helpful if there were options like lavender, purple, green, orange, or yellow so that every family member could have their own distinct color to avoid any mix-ups. Aside from the color limitation, it’s a fantastic toothbrush that I highly recommend! ... show more
Reviewed in the United States on January 15, 2026 by Races
    • Smaller size
Size: 1 Count (Pack of 1) Color: Deep Pink
My old sonicare that I’ve had for 10 years is getting really loud and annoying so I decided to replace it and saw a good deal on this brush. I didn’t realize that when I got it it would be smaller and not as powerful, but of course that’s the reason it costs less. I think it’s perfect as an entrée into Philips sonicare because it is a very effective brush and since I’m a smaller person, I’ll learn to adjust myself to this. It’s a very very good brush. ... show more
Reviewed in the United States on January 2, 2026 by A in Texas
    • High quality gentle thorough cleaning
Size: 1 Count (Pack of 1) Color: Deep Pink
It’s a great toothbrush. Good toothbrush head, gentle but strong. Visible better cleaning although it might feel different than bulky louder units. Watch your smile get real.
Reviewed in the United States on March 2, 2026 by Semi OK
    • Good Buy
Size: 1 Count (Pack of 1) Color: Deep Pink
Love my Sonicare toothbrush. I had switched to another brand and it wasn't getting the job done. Back to Sonicare and this one works so well.
Reviewed in the United States on March 30, 2026 by julieg
    • Gets the job done
Size: 1 Count (Pack of 1) Color: Deep Pink
No complaints! Works well, love the pink. Long charge life.
Reviewed in the United States on March 31, 2026 by Amazon Customer
    • Used to be good but....
Size: 1 Count (Pack of 1) Color: Deep Pink
I got this to replace a much more expensive Sonicare brush that went wonky on me. Crazy thing started turning on by itself. First time it happened was in the middle of the night. The noise woke me up and I couldn't figure out what is was. It then turned off. I walked into the bathroom and the crazy thing turned and started bouncing around. It scared the bejeezus out of me and had me trying to remember the number for Ghostbusters. Once I figured out it wasn't possessed and wasn't going to go back to working correctly I ordered this toothbrush. I'm not going to lie, the fact it was pink played a huge part. I knew I wanted another Sonicare so easy choice. The brush comes with a charger that plugs into a USB instead of the wall which is the DUMBEST idea ever. In order to actually use your toothbrush charger you have to buy a separate adapter. Just an absolutely TERRIBLE idea. Whoever thought that up and whoever approved it should be fired immediately. I contacted the company and asked if the charger for my previous toothbrush would work and they said "yes, no problem". So, I pop it on the charger and it does show it's charging and it does charge. Sort of. The old toothbrush would fully charge overnight and show a full charge in the morning. The new toothbrush said it's still charging three days later. When I take it off the charger it shows partially charged. Put it back on and a couple days later it shows "charging" while on the charger but "charged" when you take it off. All this is indicated by little lights and their color and flash or solid light. Basically it's just a crapshoot. I've started using it until it says it needs a charge then putting it on the charger overnight and using it until it says it needs charging. Wash, rinse, repeat. The toothbrush has some basic features that the instructions say you can turn on/off by pressing the buttons. Another crapshoot. The only thing I got to work was the high/low brush vibration feature. The rest I gave up on. You don't need them anyway. So the charger (if you can call it that) is stupid because you can't plug it into a wall without buying an adapter. The programming is a mess. The bright pink color looks more like a piece of chewed up bubblegum that's been stuck to a dirty city sidewalk for 4 years, not the pink you see in the pictures. I'm super happy they offered pink but it's the worst pink you can imagine, dirty chewed bubblegum pink. Yuk. There is a LOT to dislike about this toothbrush but.....when it comes to brushing your teeth, it works EXTREMELY well so it's a win I guess. Had this thing cost more than it did, I wouldn't be able to recommend it but all the bad stuff aside it's great for cleaning your teeth which is all that really matters. You're going to have to buy an adapter to plug it into your wall so go ahead and order one if you choose one of these toothbrushes. Then write the company and tell them they are idiots. It is what it is. EDIT: I've dropped the review from 4 stars to two. It's almost exactly 3 years since I bought this and the "On" button has collapsed into the body of the toothbrush making it extremely difficult to turn on. It started about 6 months ago when I heard a loud pop as I pushed the on button one morning. I started looking at other reviews and sure enough there were several people experiencing the same problem and even with new brushes. Clearly something has changed at the Philips Sonicare factory because quality went from job 1 to "what's this quality control you speak of?". Now's the question, do I buy another knowing it's probably going to break, buy a weird Sonicare copy that's automatically questionable or switch back to the brand I left when I switched to Sonicare? We are pretty vested in Sonicare so I may have to get another. If it breaks I'll go full scorched earth in the review, I should be doing that anyway. A once great company but now they are just putting out absolute garbage. Meh EDIT: Just like clockwork the replacement toothbrush started malfunctioning and within a week was dead. These things are designed to die within a certain time, it's called "planned obsolescence". The little rubber skirt that goes around the metal brush vibrater will allow small amounts of water in and causes rust to develop on the electronics. The rubber that covers the push button is low quality and wears through 3-4 years after first use. That allows even more moisture to get inside. Philips could easily make that skirt and button cover more durable but they want you having to replace the unit every three to four years (planned obsolescence). They know there's no competition and most people will buy another one. I'm on my third one I think, maybe fourth as of yesterday. I don't consider the Oral B to be a competitor. I've used one for a few years but it never cleaned as well as the Sonicare. One one hand I despise Sonicare for purposely building junk that has to be replaced every three years on the other hand the toothbrush works better than anything else (when it does work). So I've been knocking stars off each time I have to replace one of these expensive disposable toothbrushes and we're down to two stars which means I have to go to one star. Sonicare, you make a great toothbrush but your quality is terrible and it's clearly on purpose so you get one star now. I wish I could drop another but one is as low as I'm allowed to go on here. ... show more
Reviewed in the United States on April 24, 2022 by BrandiW

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