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phoinix | Staff 24.2K Views
Feb 5, 2026 7:55 AM

Philips Sonicare 4100 Rechargeable Electric Toothbrush (Black, HX3681/24)

$30

$50

40% off
+ Free Shippingat Amazon
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Update: This popular deal is still available.

Amazon has Philips Sonicare 4100 Rechargeable Electric Toothbrush (Black, HX3681/24) on sale for $39.99 - $10 clip coupon on the page = $29.99. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.
  • Note: You must be logged in to clip coupons; coupons are typically for one-time use.
About this Item:
  • Advanced plaque removal: this sonic toothbrush is clinically proven to remove up to 7x more plaque than a manual toothbrush while protecting your gums
  • Gentle on gums: Philips Sonicare sonic electric toothbrush for adults offers a superior brushing experience and features soft brush heads with nylon bristles for gentle yet effective clean
  • Smart brushing: a pressure sensor that automatically detects pressure you apply, warns you, and reduces the toothbrush vibrations to help protect your gums
  • Enhance your oral care routine with sonic technology: 31,000 brush strokes per minute gently clean your teeth, break up plaque, and sweep it away for an exceptional daily clean
  • Sleek black design: a stylish black toothbrush that enhances any bathroom aesthetic
  • The set includes: 1x handle, 1x C2 Optimal Plaque Control brush head, 1x USB charge

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Deal:
    • Our research indicates that this deal is $9.97 less (24.95% savings) than the next best available price from a reputable merchant with prices starting at $39.96 at the time of this posting.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Update: This popular deal is still available.

Amazon has Philips Sonicare 4100 Rechargeable Electric Toothbrush (Black, HX3681/24) on sale for $39.99 - $10 clip coupon on the page = $29.99. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.
  • Note: You must be logged in to clip coupons; coupons are typically for one-time use.
About this Item:
  • Advanced plaque removal: this sonic toothbrush is clinically proven to remove up to 7x more plaque than a manual toothbrush while protecting your gums
  • Gentle on gums: Philips Sonicare sonic electric toothbrush for adults offers a superior brushing experience and features soft brush heads with nylon bristles for gentle yet effective clean
  • Smart brushing: a pressure sensor that automatically detects pressure you apply, warns you, and reduces the toothbrush vibrations to help protect your gums
  • Enhance your oral care routine with sonic technology: 31,000 brush strokes per minute gently clean your teeth, break up plaque, and sweep it away for an exceptional daily clean
  • Sleek black design: a stylish black toothbrush that enhances any bathroom aesthetic
  • The set includes: 1x handle, 1x C2 Optimal Plaque Control brush head, 1x USB charge

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Deal:
    • Our research indicates that this deal is $9.97 less (24.95% savings) than the next best available price from a reputable merchant with prices starting at $39.96 at the time of this posting.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff

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Top Comments

EdWrap
344Comments
57Reputation
FYI, Sonicare gimped the vibration motor on the 4100 a few years ago. If you're replacing an older 4100, you'll probably notice a difference
Go to Comment
AmusedFruit500
280Comments
38Reputation
If you look on YouTube you can find videos of people replacing the batteries in the 4100. It takes a standard 18650 cell on the inside.
Go to Comment
BlueCalendar4084
52Comments
26Reputation
My old one lasted 7 years and was still going. It was still fine but the battery was getting weak, too bad they aren't replaceable. I decided to try one of the Oral-B IO brushes because there were always people saying they were great. Big mistake and by the time I realized I hated it, it was too late to return it. Now I want to get another 4100 and when I look at the recent reviews it seems enshittification has hit hard. Can't rely on any brand or model these days😭
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29 Comments

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Feb 5, 2026 1:27 PM
1.3K Comments
Joined May 2021
ImagineNoReligionFeb 5, 2026 1:27 PM
1.3K Comments
This uses much less battery than the iO 8 I got for $110 (with $100 Amazon card opening bonus). It's much less flashy and doesn't put a smiley on a display, but you just want it to brush your teeth, right?
Feb 5, 2026 1:33 PM
344 Comments
Joined Aug 2011
EdWrapFeb 5, 2026 1:33 PM
344 Comments

Our community has rated this post as helpful. If you agree, why not thank

FYI, Sonicare gimped the vibration motor on the 4100 a few years ago. If you're replacing an older 4100, you'll probably notice a difference
12
1
Feb 5, 2026 1:35 PM
629 Comments
Joined Mar 2011
stuukeFeb 5, 2026 1:35 PM
629 Comments
This model didn't last very long for me.
1
1
Feb 5, 2026 1:47 PM
1K Comments
Joined Apr 2015
Milkbox247Feb 5, 2026 1:47 PM
1K Comments
Quote from EdWrap View quoted comment :
FYI, Sonicare gimped the vibration motor on the 4100 a few years ago. If you're replacing an older 4100, you'll probably notice a difference
I personally use the lowereat vibration anyway
Feb 5, 2026 1:55 PM
52 Comments
Joined Jun 2022
BlueCalendar4084Feb 5, 2026 1:55 PM
52 Comments
My old one lasted 7 years and was still going. It was still fine but the battery was getting weak, too bad they aren't replaceable. I decided to try one of the Oral-B IO brushes because there were always people saying they were great. Big mistake and by the time I realized I hated it, it was too late to return it. Now I want to get another 4100 and when I look at the recent reviews it seems enshittification has hit hard. Can't rely on any brand or model these days😭
Feb 5, 2026 2:06 PM
110 Comments
Joined Jun 2018
TenderWinter9234Feb 5, 2026 2:06 PM
110 Comments
Quote from stuuke View quoted comment :
This model didn't last very long for me.
Idk how old yours is but they have a 2.5yr warranty
Feb 5, 2026 2:40 PM
52 Comments
Joined Aug 2021
AmusedHamster6907Feb 5, 2026 2:40 PM
52 Comments
Seems alright. My last one finally broke.

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Feb 5, 2026 2:51 PM
617 Comments
Joined Feb 2006
mookothekingFeb 5, 2026 2:51 PM
617 Comments
Quote from EdWrap View quoted comment :
FYI, Sonicare gimped the vibration motor on the 4100 a few years ago. If you're replacing an older 4100, you'll probably notice a difference
Agreed. This one has much weaker vibrations. Not sure if it cleans as well. Is there models where the vibration is stronger?
Feb 5, 2026 3:55 PM
685 Comments
Joined Aug 2008
bosseDEALzFeb 5, 2026 3:55 PM
685 Comments
Perfect for my travel bag without breaking the bank
Feb 5, 2026 4:02 PM
136 Comments
Joined Mar 2018
NeatBreakfast1844Feb 5, 2026 4:02 PM
136 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from mookotheking View quoted comment :
Agreed. This one has much weaker vibrations. Not sure if it cleans as well. Is there models where the vibration is stronger?
Pre-enshittified 4100 were "Philips Sonicare ProtectiveClean 4100 Rechargeable Electric Toothbrush" , model number HX6811/01. Look for ProtectiveClean on the box. You could still get some at Best Buy up until last year. Once in a while there'll be new ones that pop up on eBay.
1
Feb 5, 2026 7:41 PM
47 Comments
Joined Apr 2018
AlexK4968Feb 5, 2026 7:41 PM
47 Comments
Quote from mookotheking View quoted comment :
Agreed. This one has much weaker vibrations. Not sure if it cleans as well. Is there models where the vibration is stronger?
I believe the better motor \ build quality start with the 5100. Philips redesigned the 4100 and secretly started selling the garbage replacement under the same name.

After I bought the 5100 my dentist told me I should have gone Oral B anyways. Given that and Philips shady redesign, I would just go Oral B next time.
Feb 5, 2026 11:48 PM
71 Comments
Joined Mar 2016
mart0522Feb 5, 2026 11:48 PM
71 Comments
Quote from stuuke View quoted comment :
This model didn't last very long for me.
Same here battery life was dismal. I believe this particular model uses NIcad batteries instead of lithium batteries
1
Feb 6, 2026 1:31 AM
1.6K Comments
Joined Nov 2007
eric_cartmanFeb 6, 2026 1:31 AM
1.6K Comments

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Quote from BlueCalendar4084 View quoted comment :
My old one lasted 7 years and was still going. It was still fine but the battery was getting weak, too bad they aren't replaceable. I decided to try one of the Oral-B IO brushes because there were always people saying they were great. Big mistake and by the time I realized I hated it, it was too late to return it. Now I want to get another 4100 and when I look at the recent reviews it seems enshittification has hit hard. Can't rely on any brand or model these days😭
There nothing wrong with this model. I've had it for a year. It's in the charger nightly so I've not tested the battery life fully but had no issues when charging daily. As far as the vibration mechanism, I've never had it off the low setting except maybe twice and it's rough on your gums on high so defeats the purpose of these brushes. It's all nonsense on the internet that people love to parrot.
1
Feb 6, 2026 3:48 AM
280 Comments
Joined Aug 2019
AmusedFruit500Feb 6, 2026 3:48 AM
280 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from BlueCalendar4084 View quoted comment :
My old one lasted 7 years and was still going. It was still fine but the battery was getting weak, too bad they aren't replaceable. I decided to try one of the Oral-B IO brushes because there were always people saying they were great. Big mistake and by the time I realized I hated it, it was too late to return it. Now I want to get another 4100 and when I look at the recent reviews it seems enshittification has hit hard. Can't rely on any brand or model these days😭
If you look on YouTube you can find videos of people replacing the batteries in the 4100. It takes a standard 18650 cell on the inside.
5

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Feb 6, 2026 2:40 PM
580 Comments
Joined Nov 2006
JJHearnFeb 6, 2026 2:40 PM
580 Comments
Are these specific on the heads you can replace? Or are there other 3rd party ones you can use?

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