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frontpage Posted by phoinix | Staff • Last Sunday
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frontpage Posted by phoinix | Staff • Last Sunday

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

+ Free Shipping

$30

$50

40% off
Amazon
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Deal Details
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 megakimcheelove | Staff
  • Rated 4.4 out of 5 stars from customer reviews.
  • At the time of this posting, our research indicates that this is $10 lower than the next best comparable online prices starting from $39.99.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by phoinix | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
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 megakimcheelove | Staff
  • Rated 4.4 out of 5 stars from customer reviews.
  • At the time of this posting, our research indicates that this is $10 lower than the next best comparable online prices starting from $39.99.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by phoinix | Staff

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Price Intelligence

Model: Sonicare Philips 4100 Power Toothbrush - Black

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Sort: Lowest to Highest | Last Updated 7/14/2025, 11:15 PM
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Amazon$39.99
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Macy's$59.99

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Top Comments

mendrisio
5 Posts
14 Reputation
If you search for "sonicare shrinkflation" you'll find a Reddit thread that compares the assemblies of the old and current 4100. The old 4100 uses a substantial electromagnetic coil to drive the brush. The current 4100 instead uses a small motor and is overall a much simpler design. I think it would be worth it to step up to a model that uses the higher end coil instead of a cheap brushed motor that will wear out over time. Unfortunately I couldn't locate a teardown video of the current 5100 to confirm that it uses a coil driver.
Interestingly, the 5300 available in Europe, model HX7101, does have a coil driver and is much easier to service than the 5300 available in the US, model HX6423. The bottom cap can be removed just by unfastening a torx screw and the lithium ion battery is not soldered to the pcb. The YouTube video "How to replace a Philips Sonicare battery (Series 5300/5500/6100/6500/7100)" shows the disassembly process.
runner0382
4379 Posts
942 Reputation
Just had my and my wife's break after 2 years. Won't be buying another one. This is the cheapest Sonicare I know with the best tech but it has a major design failure with a screw that loosens that creates less and less vibration. Big disappointment. My E series handles all lasted 5-10 years. Off to Oral B forever.
spookymulder
433 Posts
146 Reputation
where'd the "promoted" badges go? this has only 4 upvotes (and no comments) and it's popular already?

27 Comments

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Last Sunday
433 Posts
Joined Nov 2011
Last Sunday
spookymulder
Last Sunday
433 Posts
where'd the "promoted" badges go? this has only 4 upvotes (and no comments) and it's popular already?
Last Monday
18,028 Posts
Joined Sep 2006
Last Monday
Superorb
Last Monday
18,028 Posts
Quote from spookymulder :
where'd the "promoted" badges go? this has only 4 upvotes (and no comments) and it's popular already?

SDs gotta get those Amazon super cookies...
1
Last Monday
1,548 Posts
Joined Aug 2011
Last Monday
drawz
Last Monday
1,548 Posts
According to keepa, this is typically only this price on Black Friday. My current one just stopped charging after 5 years, so in for one.
1
Last Monday
4,379 Posts
Joined Aug 2006
Last Monday
runner0382
Last Monday
4,379 Posts
Just had my and my wife's break after 2 years. Won't be buying another one. This is the cheapest Sonicare I know with the best tech but it has a major design failure with a screw that loosens that creates less and less vibration. Big disappointment. My E series handles all lasted 5-10 years. Off to Oral B forever.
Last Monday
1,285 Posts
Joined Nov 2016
Last Monday
nksduser
Last Monday
1,285 Posts
Doesn't feel the same as the previous builds that came with a regular charger. My old one is noticeably heavier, heftier, and has stronger vibrations than the new one with same model number.
Last Monday
1,062 Posts
Joined Sep 2014
Last Monday
brucedc
Last Monday
1,062 Posts
Quote from nksduser :
Doesn't feel the same as the previous builds that came with a regular charger. My old one is noticeably heavier, heftier, and has stronger vibrations than the new one with same model number.
That's the idea, things are now made to break so you keep buying. It's mind blowing. In the future, it may be one time use and it may just disintegrate afterwards.
Last Monday
12 Posts
Joined Sep 2021
Last Monday
TenderSparrow9114
Last Monday
12 Posts
Quote from runner0382 :
Just had my and my wife's break after 2 years. Won't be buying another one. This is the cheapest Sonicare I know with the best tech but it has a major design failure with a screw that loosens that creates less and less vibration. Big disappointment. My E series handles all lasted 5-10 years. Off to Oral B forever.

Which Oral B?

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Last Monday
104 Posts
Joined Feb 2011
Last Monday
fimbu1vetr
Last Monday
104 Posts
Quote from runner0382 :
Just had my and my wife's break after 2 years. Won't be buying another one. This is the cheapest Sonicare I know with the best tech but it has a major design failure with a screw that loosens that creates less and less vibration. Big disappointment. My E series handles all lasted 5-10 years. Off to Oral B forever.
Shame the quality has gone downhill. Bought my Sonicare 6100 in 2018 and it still works well.
1
Last Monday
5 Posts
Joined May 2022
Last Monday
mendrisio
Last Monday
5 Posts

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

Quote from nksduser :
Doesn't feel the same as the previous builds that came with a regular charger. My old one is noticeably heavier, heftier, and has stronger vibrations than the new one with same model number.
If you search for "sonicare shrinkflation" you'll find a Reddit thread that compares the assemblies of the old and current 4100. The old 4100 uses a substantial electromagnetic coil to drive the brush. The current 4100 instead uses a small motor and is overall a much simpler design. I think it would be worth it to step up to a model that uses the higher end coil instead of a cheap brushed motor that will wear out over time. Unfortunately I couldn't locate a teardown video of the current 5100 to confirm that it uses a coil driver.
Interestingly, the 5300 available in Europe, model HX7101, does have a coil driver and is much easier to service than the 5300 available in the US, model HX6423. The bottom cap can be removed just by unfastening a torx screw and the lithium ion battery is not soldered to the pcb. The YouTube video "How to replace a Philips Sonicare battery (Series 5300/5500/6100/6500/7100)" shows the disassembly process.
3
1
Last Monday
15 Posts
Joined Dec 2011
Last Monday
uwimage
Last Monday
15 Posts

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

Quote from mendrisio :
If you search for "sonicare shrinkflation" you'll find a Reddit thread that compares the assemblies of the old and current 4100. The old 4100 uses a substantial electromagnetic coil to drive the brush. The current 4100 instead uses a small motor and is overall a much simpler design. I think it would be worth it to step up to a model that uses the higher end coil instead of a cheap brushed motor that will wear out over time. Unfortunately I couldn't locate a teardown video of the current 5100 to confirm that it uses a coil driver.
Interestingly, the 5300 available in Europe, model HX7101, does have a coil driver and is much easier to service than the 5300 available in the US, model HX6423. The bottom cap can be removed just by unfastening a torx screw and the lithium ion battery is not soldered to the pcb. The YouTube video "How to replace a Philips Sonicare battery (Series 5300/5500/6100/6500/7100)" shows the disassembly process.
We're not allowed to service our own devices in the US, cost of freedom I guess? Jealous!
1
Last Monday
695 Posts
Joined Apr 2016
Last Monday
lordvoom2
Last Monday
695 Posts
Great black Friday price for anyone in need.
1
Last Monday
4,598 Posts
Joined Jun 2008
Last Monday
AndrewinMD
Last Monday
4,598 Posts
Buying this so that my wife and I have different colors (she also has the lower model so also an upgrade).
1
Last Monday
1,548 Posts
Joined Aug 2011
Last Monday
drawz
Last Monday
1,548 Posts
Quote from mendrisio :
If you search for "sonicare shrinkflation" you'll find a Reddit thread that compares the assemblies of the old and current 4100. The old 4100 uses a substantial electromagnetic coil to drive the brush. The current 4100 instead uses a small motor and is overall a much simpler design. I think it would be worth it to step up to a model that uses the higher end coil instead of a cheap brushed motor that will wear out over time. Unfortunately I couldn't locate a teardown video of the current 5100 to confirm that it uses a coil driver.
Interestingly, the 5300 available in Europe, model HX7101, does have a coil driver and is much easier to service than the 5300 available in the US, model HX6423. The bottom cap can be removed just by unfastening a torx screw and the lithium ion battery is not soldered to the pcb. The YouTube video "How to replace a Philips Sonicare battery (Series 5300/5500/6100/6500/7100)" shows the disassembly process.
I've had several Sonicare models over the years and they've mostly died from water intrusion. In one of those repair videos, they note that the PCB should really have a conformal coating, which wouldn't cost much, but would protect against corrosion. The seals are not great and they seem worse on the newer models. I ordered a replacement with this deal - only time will tell if the motor, battery, or corrosion break it. Unfortunately, it's a race to the bottom with everything these days. I don't think Oral-B is any better.

Actually, it's tempting to import one of those serviceable models from Europe! Must be some European regulation related to serviceability or keeping the batteries out of the landfill. Just checked, they're $150 on ebay, so you can get 5 cheap ones for the same $.
1
Last Monday
234 Posts
Joined Apr 2009
Last Monday
markazali
Last Monday
234 Posts
Quote from runner0382 :
Just had my and my wife's break after 2 years. Won't be buying another one. This is the cheapest Sonicare I know with the best tech but it has a major design failure with a screw that loosens that creates less and less vibration. Big disappointment. My E series handles all lasted 5-10 years. Off to Oral B forever.
Oh. So this is what happened to mine...

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Last Monday
224 Posts
Joined Jul 2019
Last Monday
Trukyatto
Last Monday
224 Posts
Quote from runner0382 :
Just had my and my wife's break after 2 years. Won't be buying another one. This is the cheapest Sonicare I know with the best tech but it has a major design failure with a screw that loosens that creates less and less vibration. Big disappointment. My E series handles all lasted 5-10 years. Off to Oral B forever.
Yeah, I had an issue with one of my Sonicare toothbrushes and I'm pretty sure it's this one. The please where the brushhead attachs got loose and it doesn't vibrate properly. Can you recommend an alternate one? Maybe I should go for a cheaper one.
1

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