---
product_id: 404099178
title: "Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24"
brand: "philips sonicare"
price: "7358 som"
currency: KGS
in_stock: null
reviews_count: 9
url: https://www.desertcart.kg/products/404099178-philips-sonicare-4100-series-electric-toothbrush-sonic-toothbrush-with-advanced
store_origin: KG
region: Kyrgyzstan
---

# 14-day battery life on single charge Advanced Sonic Tech - 31,000 brush strokes/min Pressure sensor alerts to protect gums Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24

**Brand:** philips sonicare
**Price:** 7358 som
**Availability:** ❌ Out of Stock

## Summary

> ✨ Elevate your smile game with Philips Sonicare — where tech meets timeless care!

## Quick Answers

- **What is this?** Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24 by philips sonicare
- **How much does it cost?** 7358 som with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/404099178-philips-sonicare-4100-series-electric-toothbrush-sonic-toothbrush-with-advanced)

## Best For

- philips sonicare enthusiasts

## Why This Product

- Trusted philips sonicare brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Long-Lasting Battery:** Up to 14 days of cordless freedom on a single USB charge
- • **Smart Pressure Sensor:** Gentle reminders to prevent gum damage and ensure safe brushing
- • **700% More Plaque Removal:** Clinically proven to outperform manual brushing for a radiant smile
- • **Optimized Brushing Routine:** QuadPacer & Smartimer guide you to perfect 2-minute clean every time
- • **Brush Head Replacement Reminder:** Stay on top of oral hygiene with timely brush head alerts

## Overview

The Philips Sonicare 4100 Series electric toothbrush combines advanced sonic technology delivering 31,000 brush strokes per minute with smart features like a pressure sensor, QuadPacer, and Smartimer to ensure a superior, dentist-recommended clean. Its rechargeable battery lasts up to 14 days, while the brush head replacement reminder helps maintain optimal hygiene. Clinically proven to remove up to 700% more plaque than manual brushing, this sleek, black model HX3681/24 is designed for millennials who demand effective, convenient, and smart oral care.

## 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

Review: Smooth, Even Clean with Smart Features - 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!
Review: 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.

## 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 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)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B09LD7WRVS |
| Batteries  | 1 Lithium Ion batteries required. (included) |
| Best Sellers Rank | #204 in Health & Household ( See Top 100 in Health & Household ) #1 in Sonic Toothbrushes |
| Customer Reviews | 4.3 4.3 out of 5 stars (52,914) |
| Date First Available  | December 13, 2021 |
| Item model number  | HX3681/24 |
| Manufacturer  | Philips Sonicare |
| Product Dimensions  | 2.48 x 4.29 x 8.66 inches; 8.64 ounces |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Philips Sonicare
- **Item Firmness Description:** Soft
- **Power Source:** Battery Powered
- **Special Feature:** Pressure Sensor,Brushing Timer,Rechargeable,Lightweight,Ergonomic

## Images

![Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24 - Image 1](https://m.media-amazon.com/images/I/711sslP6htL.jpg)
![Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24 - Image 2](https://m.media-amazon.com/images/I/715Ti5t1oGL.jpg)
![Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24 - Image 3](https://m.media-amazon.com/images/I/718ISIg-5NL.jpg)
![Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24 - Image 4](https://m.media-amazon.com/images/I/71BMPmu7flL.jpg)
![Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Black, Model HX3681/24 - Image 5](https://m.media-amazon.com/images/I/71J4RjRnUNL.jpg)

## Questions & Answers

**Q: Why doesn't the new 4100 model have a regular plug ?  why on gods green earth did they cheap out and put a usb plug in there ??**
A: According to the review in WireCutter (Sept 2022), you can contact SonicCare and receive a free plug adapter.  I've just ordered the 4100 on Amazon.  I don't have the serial number yet, because the product doesn't arrive until tomorrow, but SonicCare customer service just told me that they would send the free plug adapter once I provide the model number and serial number to them.  They confirmed there is no charnge.  It will take 7-10 days to receive the plug adapter once I am able to provide them with the serial number.  I'll do all of that after the product arrives tomorrow.

**Q: Does anybody make a single speed electric toothbrush? I'm so tired of cycling through the speeds**
A: Cycling is the most effective way to brush each quadrant sufficiently.

**Q: What is the purpose of having two intensity modes? How do you know when you should use one or the other?**
A: if you have more sensitive teeth and gums you can use the softer mode

**Q: What do the green and yellow lights mean? what about the beeping noise after the 2 minute brush? I thought low battery but is it replacement head?**
A: Hi! When the brush head replacement reminder light of Philips Sonicare Toothbrush HX3681/24 lights up amber, kindly replace your brush head.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Smooth, Even Clean with Smart Features
*by S***E on December 3, 2025*

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!

### ⭐⭐⭐⭐⭐ Not as weak as they say
*by A***A on May 5, 2024*

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.

### ⭐⭐⭐⭐⭐ Definitely, definitely, definitely buy one
*by P***J on January 9, 2026*

A dental hygienist told me about this toothbrush over 15 years ago. It's been very effective for this whole time and hygienists are consistently surprised at how clean my teeth are when I walk in (gums are in great shape too). This product is also extremely well made and lasts for many, many years. As an added plus, the 'aftermarket' brush-heads for these usually work well, which dramatically lowers the cost of use.

## Frequently Bought Together

- Philips Sonicare 4100 Rechargeable Electric Toothbrush, with Pressure Sensor, 2 Intensity Settings, SmarTimer and QuadPacer, 14-Day Battery Life, Black, Model HX3681/24
- Toothbrush Replacement Brush Heads for Philips Sonicare C1 C2 ProtectiveClean 4100 5100, Electric Sonic Tooth Refill Head Plaque Control, 10 Pack, Black
- BrightDeal Replacement Heads for Philips Sonicare ProtectiveClean 4100 5100 6100 DiamondClean 9500 ExpertClean 7500 FlexCare HealthyWhite Electric Sonic Toothbrush C3 G3 W3 C2 G2 Brush, White, 6 Pack

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-01-28*