Philips Sonicare 4100: What You Get, and Is the Price Fair?
An entry-level Sonicare with a pressure sensor. What reviewers said, the dated deals we found, and a five-step check. We don't predict sales.
What is the lowest total you would pay for Philips Sonicare 4100 HX3681 today?
We search stores, coupons, cashback and open-box offers, and show only prices with a date on the page.
✓ This guide is for you if
- Want a basic electric toothbrush
- Want to know if today's price is fair
- Want a price alert
- Are comparing Sonicare tiers
✗ Skip it if
- Want a verdict to buy or wait (we don't predict prices)
- Want a live price (open the listing)
- Want multiple brushing modes
- Want an app
What the Sonicare 4100 is
The Philips Sonicare 4100 is an entry-level rechargeable toothbrush. Trail and Kale's review (published October 3, 2025) lists a built-in pressure sensor that vibrates and eases power when you press too hard, one cleaning mode with two intensity settings, a SmarTimer that runs two minutes, QuadPacer 30-second cues, a brush-head replacement timer and a C2 Optimal Plaque Control head. Philips rates the battery at up to 14 days; that reviewer got about 8 to 10 days brushing twice daily on high.
It has no whitening or deep-clean modes and no smart-home features. The charger is USB-A with no wall adapter or travel case.
What the price has looked like
Dated reports on Slickdeals: $24.96 with a Prime or $35+ order and a $50 list price (December 8, 2024), and $33.99 with a coupon against a $50 list (model HX3681/23, November 14, 2025). Both are expired. Trail and Kale put the Amazon list price at about $50. So deals have run roughly $25 to $34.
Black Friday is November 27, 2026. We can't predict what Philips will discount.
Check the real price history
Install the free Zroppix extension to see a 90-day price history and a BUY or WAIT verdict right on the Amazon page.
How to tell whether today's price is fair
We don't publish a price chart or a predicted price for the Philips Sonicare 4100 on this page, because we can't back one up with recorded data here. What we can give you is a method that works for any product, and the free Zroppix extension that applies it for you on the Amazon page.
- Confirm the exact version. Model year, size, colour and bundle can each change the price. Read the title and the variant selector, not just the headline.
- Open the price history. Use the Zroppix extension (90-day history on Amazon pages) or another tracker such as CamelCamelCamel or Keepa. Where Amazon shows its own price history link, use that too.
- Compare today's price with the lowest in the window. At or near the low is a fair price. A big "percent off" badge on its own proves little, as our guide to sale badges explains.
- Check who sells it. Amazon or the brand is safest. Compare against the manufacturer's own site, which may run separate promotions.
- Set an alert if the price isn't right yet, and decide on your own timeline. Nobody can tell you what the price will do next.
Who should look at it
- You want a basic, reliable electric brush: the 4100 does the core job.
- You want modes and an app: look at higher tiers.
- You travel a lot: buy a case, because none is included.
- You want a bargain: compare against the $25 to $34 deals above.
Common mistakes when buying
- Counting the $50 list price as the real price. Compare history.
- Forgetting brush heads. Heads need replacing.
- Assuming a travel case is included. It isn't.
- Buying the wrong colour or version. Check HX3681.
Compare before you decide
If the price isn't right, or you want to compare options, these are worth a look.
Pressure sensor, two intensity settings, SmarTimer and QuadPacer, per the Slickdeals listing.
Check before buying: Confirm model HX3681 and colour.
The next tier up in the Sonicare line.
Check before buying: Check the model and what modes it adds.
The usual competitor.
Check before buying: Check model and brush head cost.
The 4100 uses C2 Optimal Plaque Control heads.
Check before buying: Match the C2 head type to your handle.
The 4100 comes without a travel case, per Trail and Kale.
Check before buying: Check it fits the handle.
Philips Sonicare 4100 price reference points
Dated reports, not today's prices. Both expired.
| Date | Model | Reported price | Source | Check it |
|---|---|---|---|---|
| Dec 8, 2024 | Sonicare 4100 | $24.96 vs $50 list; expired | Slickdeals | Find cheaper → |
| Nov 14, 2025 | Sonicare 4100 HX3681/23 | $33.99 after coupon vs $50 list; expired | Slickdeals | Find cheaper → |
Honest pros and cons
What stands out
- Pressure sensor
- SmarTimer and QuadPacer
- Low deal prices reported
- Reliable core brushing, per Trail and Kale
What to weigh
- One mode, two intensities
- USB-A charger, no case
- No smart features
- We show no live prices
Before you buy
A quick checklist for this purchase.
- Confirm the exact model in the listing title and variant selector.
- Check what's included: bundle, accessories, colour.
- Open the price history for that exact model.
- Compare today's price with the lowest in the window.
- Check the seller and the return window.
- Set an alert if the price isn't right yet.
Keep going
Frequently asked questions
What does the Sonicare 4100 include?
A pressure sensor, SmarTimer, QuadPacer, two intensity settings and a C2 brush head, per Trail and Kale and Slickdeals.
How long does the battery last?
Philips rates up to 14 days. Trail and Kale got about 8 to 10 days brushing twice daily on high.
How much does it cost?
The list price is about $50. Slickdeals reported $24.96 (Dec 2024) and $33.99 (Nov 2025). Check the live listing.
Does it come with a travel case?
No, per Trail and Kale.
Does it have a whitening mode?
No. It has one cleaning mode with two intensities.
Will it go on sale for Black Friday?
We can't predict it. Black Friday is November 27, 2026.
How do I check the price history?
Install the free Zroppix extension for a 90-day history on Amazon pages, or use CamelCamelCamel or Keepa.
Buy at a fair price, not a hyped one
Confirm the version, check the history, and set an alert if it isn't there yet.
🛡️ See the Real Price History
The free Zroppix extension shows a product's price history and a BUY or WAIT verdict right on the Amazon page, so you can tell a real deal from a fake discount.
Install Zroppix Free →Keep reading
How this page was made. Written by the Zroppix team with AI assistance (Claude, from Anthropic). Prices and facts can change after a page is written, so check the retailer’s own page before you buy. This page has no affiliate links. We make Zroppix and sell Zroppix Pro, a paid plan.