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 ??

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.

Does anybody make a single speed electric toothbrush? I'm so tired of cycling through the speeds

Cycling is the most effective way to brush each quadrant sufficiently.

What is the purpose of having two intensity modes? How do you know when you should use one or the other?

if you have more sensitive teeth and gums you can use the softer mode

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?

Hi! When the brush head replacement reminder light of Philips Sonicare Toothbrush HX3681/24 lights up amber, kindly replace your brush head.

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Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Deep Pink, Model HX3681/26

Philips Sonicare 4100 Series Electric Toothbrush - Sonic Toothbrush with Advanced Sonic Technology, Pressure Sensor, Two Intensity Settings, Smartimer & Quadpacer, Deep Pink, Model HX3681/26

Product ID: 388125043

Details

Age Range (Description)
Adult
Brand
Philips
Item Firmness Description
Soft
Power Source
Battery
Special Feature
Pressure Timer

⚡14-day battery life

📏2 intensity settings & pressure sensor

🦷700% better plaque removal

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VT16790

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Details

Age Range (Description)
Adult
Brand
Philips
Item Firmness Description
Soft

Description

🦷 Elevate your smile game with sonic precision and smart care!

PRECISION TIMING TECH - QuadPacer and Smartimer ensure you brush every quadrant for the dentist-recommended 2 minutes.
SMART PRESSURE SENSOR - Protect your gums with gentle reminders to ease off when brushing too hard.
CLINICALLY PROVEN DEEP CLEAN - Removes up to 700% more plaque than manual brushes for a dentist-level smile.
TAILORED BRUSHING EXPERIENCE - Two intensity settings plus EasyStart mode for a smooth transition to sonic cleaning.
LONG LASTING RECHARGEABLE POWER - Up to 14 days of use on a single charge—perfect for busy professionals on the go.

The Philips Sonicare 4100 Series electric toothbrush combines advanced sonic technology with a pressure sensor and customizable intensity settings to deliver up to 700% better plaque removal than manual brushing. Featuring a rechargeable battery lasting up to 14 days, smart timers, and brush head replacement reminders, it offers a professional-grade clean that fits seamlessly into your daily routine.

Specifications

ASIN	B09LD8VFS1
Age Range (Description)	Adult
Age Range Description	Adult
Best Sellers Rank	#165 in Health & Household ( See Top 100 in Health & Household ) #1 in Sonic Toothbrushes
Brand	Philips Sonicare
Brand Name	Philips Sonicare
Bristle Material	Nylon
Color	Deep Pink
Customer Reviews	4.4 out of 5 stars 13,843 Reviews
Global Trade Identification Number	00075020100771
Handle Material	Plastic
Included Components	1 Philips Sonicare 4100 handle, 1 Optimal Plaque Control (C2) brush head, 1 charger
Item Dimensions	2.48 x 4.29 x 8.66 inches
Item Firmness Description	Soft
Item Weight	0.54 Pounds
Manufacturer	Philips Sonicare
Manufacturer Part Number	HX3681/26
Material Features	Reusable
Model Name	4100 Series
Model Number	HX3681/26
Mount Motion	Vibrate
Number of Items	1
Number of Pieces	1
Number of settings	2
Operation Mode	Automatic
Other Special Features of the Product	Pressure Sensor,Brushing Timer,Rechargeable,Lightweight,Ergonomic
Package Type Name	Box
Power Source	Battery Powered
Reusability	Reusable
Special Feature	Pressure Sensor,Brushing Timer,Rechargeable,Lightweight,Ergonomic
Target Audience	Unisex-Adults
Toothbrush Head Shape	Round
UPC	075020100771
Unit Count	1 Count

Reviews

M**N

20.10.2023

A**K

2.04.2026

R**S

15.01.2026

A**S

2.01.2026

S**K

2.03.2026

J**G

30.03.2026

A**R

31.03.2026

B**W

24.04.2022

B**N

3.09.2025

H**D

7.09.2024

T**O

1.08.2023

S**M

28.05.2024

M**K

31.08.2023

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