Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, White, Model HX3681/23
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Availability:
Only 3 left in stock, order soon!
Arrives
Wednesday, Jun 3
Size: 1 Count (Pack of 1)
Color: White
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 : HX3681/23
Batteries : 1 Lithium Ion batteries required. (included)
Date First Available : December 13, 2021
Manufacturer : Philips Sonicare
Best Sellers Rank: #150 in Health & Household (See Top 100 in Health & Household) #1 in Sonic Toothbrushes
#1 in Sonic Toothbrushes:
Customer Reviews: 4.2 4.2 out of 5 stars (19,938)
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: Boys, Girls, Unisex-Adults, Unisex-Kids
Package Type Name: Box
Global Trade Identification Number: 57
Manufacturer: Philips Sonicare
UPC: 075020100757
Manufacturer Part Number: HX3681/23
Model Number: HX3681/23
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: Electric
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: 8.64 ounces
Material Features: Reusable
Bristle Material: Nylon
Handle Material: Plastic
Color: White
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Jun 3
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: 1 Count (Pack of 1)
Color: White
The Philips Sonicare 4100 Series (HX3681/23) is a powerhouse entry-level electric toothbrush that prioritizes gum health and ease of use over unnecessary "smart" gimmicks. It’s a perfect upgrade for those moving from a manual brush who want the proven Sonicare cleaning power without a triple-digit price tag. Excellent Battery Life: Lasts up to 14 days on a single charge. Slim & Lightweight: Very comfortable to hold and easy to pack for travel. The 4100 Series is widely regarded as the "sweet spot" in the Sonicare lineup. It provides the essential features—pressure sensor and timer—that actually improve oral health, while skipping the expensive Bluetooth apps. It’s reliable, effective, and often available for under $50.
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Reviewed in the United States on May 8, 2026 by Sonny
Size: 1 Count (Pack of 1)
Color: White
This is my 1st electric toothbrush. I ordered it over the oral b smart 1500 because it's cheaper and I found more people who swear by it than oral b. Later on, I read comments where people who have this 4100 for 10+ years say that the newer 2021 version has only half the power of the old version. Someone on reddit showed images of the inside of the new and old versions and the new version has a small plastic toy-like motor, while the old version has a big copper-wrapped motor and an old version user said "now I understand why the new version is lighter and less powerful". I was disappointed on the new version and tried to cancel the order but I couldn't. Once it came, I decided to try it and to my surprise, it brushes my teeth way better than my manual soft-bristled and hard-bristled toothbrushes(I use both manual brushes daily compared to my daily usage of the electric toothbrush 4100 C2 head of medium bristles. If you have gum sensitive issue, buy the S sensitive or G2 optimal brush head. If you want hard-bristled, buy W diamondclean brush head). I don't know how good the old version was but this newer version definitely brushes better than any manual toothbrush unfortunately it doesn't not come with a travel case. Update 5/16/2024: I bought the Oral B smart 1500 because it was on sale and I wanted to see how better it is compared to the sonicare. The oral B package looks nicer and bigger than the Sonicare but upon opening the smart 1500 package, I saw hair all over the toothbrush. I did read many customers saying on reddit that their Oral b toothbrush were repackaged, but I can't believe I'm a victim of this nastiness. It also took 2 weeks to reach me from Hawaii and since it says "made in China", I think the seller is located in China. I'll return this and I'll advise you to buy the Sonicare instead of the oral b if you don't want to be cheated receiving a used-repackaged toothbrush. Update 05/22/2024: On 05/17/24, I bought the Oral b smart clean 360 which has exact power as the smart 1500 that I returned but the smart 360 has 5 modes and a button to change the mode while the smart 1500 has 3 modes and no button to switch between the modes. The advantage of the oral b smart clean 360 is that the brush heads cost is cheaper than the Sonicare 4100 and I find it better at whitening my teeth than the Sonicare. That's all the advantages there. The things that I don't like with it are many, so I'm just going to name the most annoying ones: 1) The brush heads are too big compared to the Sonicare(see picture): Putting Oral b brush heads in my mouth is like putting a golf ball in my mouth(my head and mouth are wider than the average US male). 2) The brush heads have holes(see pictures) that trap saliva+toothpaste and creates more noise when the brush handle needle rotates in the presence of the liquid mixture, and moisture will be also trapped easily in the holes(most customers complain about Oral b brush heads design. Oral b corrected the needle issue with the IO version but the IO introduced a shallow hole which now traps moisture in the brush handle). When I'm using the Oral b with no choice but to have my mouth wide-open, it forces my mouth to produce more saliva which gets mixed with the toothpaste and enters the brush head and creates more noise. 3) Rattling noise: The Oral b smart clean 360 isn't as noisy as people say. It's the quality of the noise the problem. It's a very unpleasant rattling noise as if you're hearing an old car engine with broken parts in it. That noise gets worse when liquid enters the brush head holes. 4) The charger is not round like a perfect circle: You must put the Oral b brush handle in a specific position to charge it and if you place it wrong, it'll fall and might break. 5) The Daily Clean mode is rough and combined with the big brush head the experience is bad, but the smart clean 360 has more mode which make it smoother and better than the smart 1500 but not as good as the Sonicare 4100. 6)It has no auto-stop mode: You keep brushing without knowing how long you have been brushing your teeth. To summarize, the oral b non-IO brush heads are cheap but very badly designed for a pleasant toothbrushing. I won't recommend it if you're shorter than 6 foot tall or have a small mouth.
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Reviewed in the United States on May 5, 2024 Reviewed in the United States on May 5, 2024 by Kirik
Size: 1 Count (Pack of 1)
Color: White
The model 4100 does everything I need for a much lower price than the Diamondclean model. Been using the 4100 for about 6 months and no regrets. I previously had the Diamondclean model which finally died after a few years of use so I needed a replacement. I didn’t need the 5 setting options or the WiFi connectivity of Diamondclean so I decided to try the 4100 model. The 4100 has two settings - I still only use one. It’s also lighter, uses the same brush heads, and has a smaller and lighter charger that should travel well. It feels the same when I’m brushing and the best part is that if it dies, I could buy about four of them for the same price as one Diamondclean. I’m extremely happy I gave it a try and saved so much money.
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Reviewed in the United States on April 6, 2026 by Dave S
Size: 1 Count (Pack of 1)
Color: White
I had always heard about the Sonicare brand of tooth brushing systems, but had never really picked one up until recently. Sonicare uses vibrating motions to move the brush over the surface of your teeth. The sensation was a little strange at first, as the brush motion can produce a "tickling" sensation on your gums, but after a few uses, you will get used to the sensation. I found it's streamlined brush systems to be very good at reaching many hard to reach areas in your mouth, yet it was still gentle enough to not damage your gums. This particular system has a 2-minute timer, which is the minimum recommended time you should spend brushing your teeth, however you can just use it for however long you need to clean your teeth. The system comes with a charging base which lasts up to 14 hours in between charges, and also a protective plastic cover for in between brushings. Overall, I am very satisfied with this system, and my teeth have never felt better. I would recommend this for any adult that is curious about Sonicare.
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Reviewed in the United States on April 6, 2026 by Caius_Ballad
Size: 1 Count (Pack of 1)
Color: White
As someone deeply invested in maintaining optimal oral health, I'm always on the lookout for products that genuinely deliver. After experiencing the Philips Sonicare 4100 Rechargeable Electric Toothbrush (Model HX3681/23), I can confidently say this isn't just another gadget; it's a game-changer for your daily brushing routine. With an impressive 4.4 out of 5 stars from over 46,000 reviews and being an Amazon's Choice with 50K+ units bought last month, it's clear I'm not alone in my enthusiasm! From the moment you unbox this sleek white device, you appreciate its ergonomic design and lightweight feel. But the real magic happens when you start brushing. Here's why the Philips Sonicare 4100 stands out and why it's a smart investment for your oral health: Unmatched Plaque Removal: Forget your manual toothbrush! This sonic powerhouse is clinically proven to remove up to 7 times more plaque. The 31,000 brush strokes per minute gently yet effectively break up and sweep away plaque, leaving your teeth feeling incredibly clean and smooth – a noticeable difference from day one. This directly addresses the core need for effective cleaning. Gentle on Gums, Smart on Pressure: One of my biggest concerns with electric toothbrushes has always been applying too much pressure. The Sonicare 4100 brilliantly solves this with its built-in pressure sensor. If you press too hard, it automatically warns you and reduces vibrations, protecting your gums from damage. This feature alone provides immense peace of mind and makes it ideal for sensitive gums. Master Your Brushing Technique: The SmarTimer and QuadPacer are invaluable. The SmarTimer ensures you brush for the dentist-recommended two minutes, while the QuadPacer guides you to brush each quadrant of your mouth equally. This takes the guesswork out of brushing and helps you develop consistently good habits. Long-Lasting Convenience: With a 14-day battery life on a single charge, this toothbrush is perfect for travel or for those who simply don't want to constantly think about recharging. The included USB charger makes it easy to power up wherever you are. Aesthetic Appeal: Beyond its performance, the sleek white design is a welcome addition to any bathroom countertop, blending seamlessly with modern aesthetics. The Verdict: The Philips Sonicare 4100 isn't just an upgrade; it's an essential tool for anyone serious about elevating their oral care routine. It combines advanced technology with user-friendly features, delivering a superior clean while protecting your gums. Considering its current 20% savings, bringing the price down to just $39.96 from $49.96, it offers exceptional value for such a high-performing device. If you're ready to experience a truly effective, gentle, and smart brushing experience, the Philips Sonicare 4100 is highly recommended. It's more than just a toothbrush; it's an investment in a healthier, brighter smile.
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Reviewed in the United States on May 25, 2025 by Amazon Customer
Size: 1 Count (Pack of 1)
Color: White
Great toothbrush. This one is a replacement for a Sonicare I bought at least 20 years ago. It made many international and national trips, so it did get a little battered up, but that makes it a pretty reasonable price. I will say that the brushers are expensive but I asked my dentist where he purchased the ones he gives away and ordered from that company, PlaquePro.com, in bulk. Be aware that you have to order about a bazillion of them, so get a big drawer ready for them. Note that if you travel, while many larger hotels do have a UBS charge station, some hotels will not, so you may want to take a UBS hub that plugs into the wall socket.
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Reviewed in the United States on April 20, 2026 by NKaye
Size: 1 Count (Pack of 1)
Color: White
I used to brush my teeth like a common laborer, moving my hand back and forth like I was trying to start a fire with two sticks. Then I bought the Philips Sonicare 4100. I realized within thirty seconds that I had been doing it wrong for thirty years. My mouth doesn't just feel clean; it feels like it’s been through a high-end car wash and then buffed with a microfiber cloth. Why Your Mouth Needs This Sonic Engine: The Vibrations of Victory: 62,000 brush movements per minute. If I tried to do that manually, my arm would fly off and hit the mirror. This thing creates a "microbubble" situation that reaches into crevices I didn't even know I possessed. The "Stop Pressing So Hard" Sensor: Apparently, I used to brush my teeth with the same intensity I use to scrub a cast-iron skillet. The 4100 has a pressure sensor that pulses when I’m being too aggressive. It’s like a gentle life coach for my gums. The Two-Minute Timer: I used to think two minutes was a long time. It turns out, my "manual" two minutes was actually about forty seconds. This brush keeps me honest. It’s the longest two minutes of my life, but my dentist’s inevitable praise will be worth it. Battery Life for Days: I charged this thing once, and I’m pretty sure it’s going to outlast my current lease. It’s the Energizer Bunny of dental hygiene. The Life Impact I combined this with my 1,000 RESHLIX Floss Picks, and I’m fairly certain my mouth is now the cleanest environment on the North American continent. I went to the dentist last week and he asked me if I’d recently had a professional cleaning. I just smiled—a blinding, sonic-powered smile—and walked out. Pros: My teeth are so smooth I can’t stop sliding my tongue over them. It’s slim, it’s sleek, and it makes my bathroom look like a futuristic spa. Cons: The vibration is so powerful that if you turn it on before it’s in your mouth, you will decorate your bathroom mirror with toothpaste art. You’ve been warned.
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Reviewed in the United States on January 29, 2026 by CJ
Size: 1 Count (Pack of 1)
Color: White
Sonicare loses cleaning power after minor drops I’ve now gone through three Sonicare toothbrushes in about two years. In my experience, even a minor drop can make the vibration much weaker. The brush still turns on and vibrates, but the power drops so much that it no longer feels like an effective electric toothbrush, even with a new brush head. That is the most frustrating part: it does not completely fail, so at first glance it seems fine, but the cleaning performance is clearly reduced. At that point, the main advantage of using an electric toothbrush is basically caput.. This has happened to me twice, and it makes the product feel far less durable than it should be for normal real-world household use. For a premium toothbrush, I expected better resistance to minor drops and better long-term reliability. I still think Sonicare is a great product, but after this repeated experience I would strongly advise buyers to be very careful with handling and not assume it can tolerate everyday bumps or falls. Planned obscolecence? Sad if it is. I am sure it should not take more than a minor cushioning, internal or external to make the product more rugged.
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Reviewed in the United States on March 23, 2026 by dereje