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 Rechargeable Electric Toothbrush, with Pressure Sensor, 2 Intensity Settings, SmarTimer and QuadPacer, 14-Day Battery Life, Black, Model HX3681/24

Philips Sonicare 4100 Rechargeable Electric Toothbrush, with Pressure Sensor, 2 Intensity Settings, SmarTimer and QuadPacer, 14-Day Battery Life, Black, Model HX3681/24

Product ID: 545747661

Details

Age range (description)
Adult
Brand
Philips
Colour
Black
Item firmness description
Soft
Material feature
Sustainable
Number of items
1

🔋2-week battery life

🦷5x plaque removal

⏱️2-min SmartTimer

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Description

🦷 Elevate your oral care game—because your smile deserves the Sonicare edge!

PLAQUE GONE 5 X FASTER - Clinically proven to remove up to 5 times more plaque than manual brushing for that enviable smile.
DENTIST APPROVED TIMING - Built-in 2-minute SmartTimer with QuadPacer ensures you hit the dentist-recommended brushing time every session.
SLEEK SUSTAINABLE DESIGN - Modern black finish with soft nylon bristles crafted for comfort and sustainability—because style and ethics matter.
TRAVEL READY USB RECHARGE - Long-lasting battery with USB charging means fresh breath anywhere—no bulky adapters needed for your on-the-go lifestyle.
PRESSURE SENSOR PROTECTION - Smart pressure sensor prevents gum damage by alerting you when you brush too hard—because your gums deserve gentle care.

The PHILIPS Sonicare 4100 Electric Toothbrush HX3681/24 offers superior plaque removal with up to 5x more effectiveness than manual brushes. Featuring a pressure sensor to protect sensitive gums, a 2-minute SmartTimer with QuadPacer for optimal brushing, and a rechargeable battery lasting up to 2 weeks per charge with convenient USB charging. Its sleek black design combines performance with sustainability, making it the perfect upgrade for health-conscious professionals.

Specifications

ASIN	B09LD7WRVS
ASIN	B09LD7WRVS
Age Range Description	Adult
Batteries	1 Lithium Ion batteries required. (included)
Best Sellers Rank	7,660 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 28 in Sonic Toothbrushes
Brand Name	Philips Sonicare
Bristle Material	Nylon
Colour	Black
Customer Reviews	4.3 4.3 out of 5 stars (34,896)
Customer reviews	4.3 4.3 out of 5 stars (34,896)
Delivery information	We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout.
Global Trade Identification Number	00075020100764
Handle Material	Plastic
Included Components	1 Philips Sonicare 4100 handle, 1 Optimal Plaque Control (C2) brush head, 1 charger
Item Dimensions	6.3 x 10.9 x 22 centimetres
Item Firmness Description	Soft
Item Weight	0.54 Pounds
Item model number	HX3681/24
Manufacturer	Philips Sonicare
Manufacturer	Philips Sonicare
Manufacturer Part Number	HX3681/24
Material Features	Sustainable
Model Name	4100
Model Number	HX3681/24
Mount Motion	Pulsate
Number of Items	1
Number of Pieces	1
Number of settings	2
Operation Mode	Powered
Other Special Features of the Product	Brushing Timer, Pressure Sensor
Package Type Name	Box
Power Source	Battery Powered
Product Dimensions	6.3 x 10.9 x 22 cm; 244.94 g
Reusability	Reusable
Target Audience	Girls, Unisex-Adults, Unisex-Kids
Toothbrush Head Shape	Round
UPC	075020100764
Unit Count	1.0 count

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