Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, White, Model HX3681/23

I bought the Philips Sonicare 4100 Rechargeable Electric Toothbrush for my husband, and he really likes it. This model is simple and straightforward—just two speeds, no extra bells and whistles, nothing overly complicated. It just cleans your teeth, which is all he wanted. It's a good design. It also has a good battery life, so he’s not constantly recharging it. Overall, a great choice if you want an effective electric toothbrush without all the fancy features you’ll never use.

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.

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.

It's working fine and does the job, but I do agree this model is smaller and the rechargeable battery does not last as long as my older model.

⭐️⭐️⭐️⭐️⭐️ Life-Changing Toothbrush — Deep Clean, Gentle on Gums, Keeps My Mouth Fresh! I’ve been using this Philips Sonicare 4100 Electric Toothbrush for months now, and honestly, it’s one of the best purchases I’ve made for my daily routine. This isn’t just another toothbrush — it’s like having a dentist-level clean in the comfort of my own bathroom!  From the very first brush, I noticed an incredible difference. My teeth feel dramatically cleaner than with any manual toothbrush I’ve used before — it literally gets into the nooks and hard-to-reach spaces between teeth and along the gumline that I always used to miss. That deep-clean feeling stays all day, and I even notice that my mouth feels fresher longer after brushing.  What I Love Most: 🦷 Powerful Sonic Cleaning Technology – This brush uses high-frequency sonic vibrations (up to tens of thousands of strokes per minute). It lifts and breaks up plaque far better than a regular brush ever has, and I can actually feel the difference.  💆‍♂️ Pressure Sensor Protects My Gums – I tend to brush too hard (guilty!), but this brush gently reminds me when I’m pressing down too much with a subtle vibration indicator. My gums have never felt sore or irritated, even on sensitive mornings.  ⏱ Smart Timer & QuadPacer – It automatically times your full 2-minute brushing session and paces you so you spend the right amount of time in each section of your mouth. Gone are the days of rushing or guessing if I brushed “enough.”  ✨ Two Intensity Settings – You can choose between gentle and stronger cleaning. I usually stick with the higher setting because it feels powerful without being hurtful, but it’s great to have options, especially if you’re new to electric brushes.  🔋 Long Battery Life – I charge it and then forget about it for days. The battery easily lasts through more than a week of twice-daily use, so no constant charging hassle. Some users even get much more than the advertised battery life.  Gentle Yet Effective: One of the things that sold me on this model is how gentle it feels on my teeth and gums. It cleans deeply, but it never hurts — no scraping or painful pressure. Even after a long day, brushing with this leaves my mouth feeling clean and refreshed without any discomfort.  A Few Things to Know: • There’s only one brushing mode with two intensity levels — so no fancy app or multiple cleaning modes like some higher-end brushes. That said, for everyday oral care, it’s perfectly sufficient and does the job exceptionally well.  • Some people note replacement brush heads are a bit pricier than some competitor brands, but with the BrushSync reminder, you’ll always know when it’s time to swap them.  Final Thoughts: If you want a toothbrush that cleans thoroughly, protects your gums, keeps your mouth fresh, and never hurts, this is absolutely worth it. It’s far superior to any manual brush, very user-friendly, and a great value for what you get. My dentist has even commented on how clean my teeth look at check-ups — and that’s coming from someone who used to dread going! Would definitely recommend this to everyone looking to upgrade their brush — especially if you want something gentle, effective, and easy to use every day. ⭐⭐⭐⭐⭐ — I love this toothbrush and will continue using it daily!

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.

I've been using $20-ish cheap knock-off sonic toothbrush. It's been working, but I got curious how Philips or Oral-B products are - they are definitely more expensive, and I've seen many good reviews on them. So here I tried this 4100 today for the first time. Definitely feeling the difference - garden hose vs fire hydrant. Brush head will be smaller then your expectation. This means you need to get busy brushing your entire teeth, but again the brush can reach to the deep area in your mouth = good for through cleaning. There are two levels of power you can control with a button. I am using the highest settings, works good. Timer feature is an added bonus.

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.