







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 : HX3681/24
Batteries : 1 Lithium Ion batteries required. (included)
Date First Available : December 13, 2021
Manufacturer : Philips Sonicare
ASIN : B09LD7WRVS
Best Sellers Rank: #153 in Health & Household (See Top 100 in Health & Household) #1 in Sonic Toothbrushes
Customer Reviews: 4.3 4.3 out of 5 stars (53,317) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
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 once it’s time; 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)
10 reviews for Philips Sonicare 4100 Series Electric Toothbrush – Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24
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Original price was: $49.96.$39.99Current price is: $39.99.

Steven S –
Huge Upgrade From a Manual Toothbrush
This toothbrush works great and leaves my teeth feeling super clean every time.It’s gentle on my gums, easy to use, and the battery lasts a long time. I’ve definitely noticed a difference since switching from a regular toothbrush.Great quality and well worth it.
Raquel Brueggemann –
My Teeth Have Never Felt So Clean — It’s Like a Car Wash for Your Mouth
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 ImpressionsLightweight, 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 ItThe 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 degreeIt 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 7AMAnd 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 homeCons• The first time you use it, your brain might rattle slightly (you adjust fast)• It will absolutely expose how badly you used to brushFinal VerdictIf 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.
Kirik –
Not as weak as they say
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.
A in Texas –
Smaller size
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.
Hoi Chun Chan –
vs old models
as good as the old models, but with smaller brush body and smaller battery, i.e. users have to charge it more frequently.Good to bring it when you are travelling
wissam hourani –
سهلة الاستخدام ، قوية وفعالة ، خفيفة.
garchingtom –
Die Zahnreinigung funktioniert sehr gut und ist in der Handhabung einfach und angenehm.Der Akku könnte etwas länger halten.
Hend –
يمكن انا ما احب الطنين ولكن ممكن تناسب البعض الفرشاة ممتازة وتنشحن وتبقى فترة طويلة جداً
Rida –
Amazing
Marie J. –
Nunca había usado uno y escuchaba que eran muy buenos y que valían la pena. Por los dientes sensibles no opté por los que giran, me fui por este que vibra y pensé que quizá sería algo Meh! …Lejos de la realidad. Es un súper cepillo! Se siente MUY POTENTE en velocidad baja hasta puedes llegar a sentir tus dientes en peligro jaja pero no te causa daño, al contrario, con los manuales me estaba lastimando el esmalte y sobre todo había partes que se sentían difíciles de alcanzar. Este lo conseguí en oferta, solo viene un cabezal y es pequeño, alcanza lugares difíciles y se siente suave con las encías, definitivamente lo recomiendo para dientes sensibles. Hay muchas opciones de cabezales para diferentes propósitos. Solo 2 velocidades y muy sencillo de usar.Lo volvería a comprar sin dudarlo.