Our unique technology gives you effective yet gentle cleaning

Microscopic bubbles penetrate deep between teeth and along gum lines as the bristles vibrate vigorously for a refreshing sensation. Just two minutes of brushing is equivalent to two months of manual brushing.** With 31,000 vibrations per minute, the brush gently cleans your teeth, breaking up and removing plaque for everyday clean teeth.

Removes up to 3x more plaque than a manual toothbrush*

The Sonicare electric toothbrush with advanced sonic technology is clinically proven to remove up to 3x more plaque* than a manual toothbrush. It removes tartar from teeth and along gum lines, while also protecting them.

Safe and gentle to use

The Sonicare toothbrush provides a thorough cleaning without damaging your teeth and gums. Gentle yet powerful sonic vibrations deliver exceptional hygiene while being gentle on your teeth and gums.

Improve your brushing with SmarTimer and QuadPacer

The 2-minute SmarTimer and 30-second QuadPacer guide you through brushing all areas of your mouth for the recommended time for a perfect clean.

The ergonomic shape makes the toothbrush easy to hold and use

The thin, lightweight and ergonomically designed brush is easy to hold and use, making brushing your teeth extremely effective and easy.

14 days of battery life

The battery life lasts up to 14 days, so you can use the brush for a long time without charging.

Easy start for an easier transition

Our Easy-Start program gives you the option of a gradual, gentle increase in brushing power over the first 14 uses of your new toothbrush.

Technical specifications

Cleaning efficiency

Performance: Removes up to 3x more plaque*
Speed: Up to 31,000 brush strokes per minute
Timer: Quadpacer and SmarTimer
Operating modes: Clean (for everyday cleaning)

Easy to use

Handle: Slim ergonomic design
Battery indicator: Light display of battery status
Brush head system: Easy-to-attach heads

Power supply

Voltage: DC 5V
Battery type: Lithium-ion
Operating time: Up to 14 days on a single charge
Charging time: Approximately 1 hour
Standby power consumption: < 0.5 W

Included items

Handle: 1 × 2100 series
Brush head: 1 × standard C1 ProResults
Charger: 1 × USB charger (power adapter not included)

Design and manufacturing

Color: Light blue

Service

Warranty: 2-year limited warranty

It is important to know

Before buying a Philips HX3651/12 Sonicare 2100 electric toothbrush, it's a good idea to consider your brushing habits and your expectations for features. The most important decision is whether you need more advanced features or whether a basic model with the essentials for everyday use is sufficient. The focus should be on practical use and handling of the brush according to your living circumstances.

• The model is based on sonic technology with a basic interval timer, which is enough for most adults who want a simple but effective routine.
• This version does not have a pressure sensor, so it is not ideal for those who often press too hard while brushing – in which case, consider a model with this feature.
• Single packaging means that the set is intended primarily for one user; for a couple, it makes more sense to choose a double packaging or purchase an additional handle separately.
• The built-in battery allows for up to two weeks of use without recharging, which is practical for everyday use and even short trips without additional accessories.
• The replacement heads are standard Sonicare sizes and systems; before purchasing, make sure that replacement heads for this model are easily available.

Source of editorial recommendations: ENAA guides and team experience.

In practice

🟢 Daily brushing for adults

This model is well suited for the basic routine of adults, as it combines an effective timer and proven brushing technology.

🟡 Use for sensitive gums

Suitable with limitations – the gentle sonic technology is suitable, but the model does not offer additional intensity adjustment or a special gentle program.

🔴 Users who often press too hard

Less convenient – because the brush does not have a pressure sensor, it does not warn when the pressure exceeds the optimal level.

🟢 Frequent travel

Due to its long battery life and compact design, the brush is also useful for traveling, although a case is not included.

🔴 Purchase for two people

Less suitable – single packaging and one handle are not optimal for simultaneous use by two people; in this case, a double set is more suitable.

Answers to frequently asked questions

Does the brush have multiple brushing programs?

No, this model has a basic sonic brushing mode without additional programs or intensity settings.

What attachments can I use?

The attachments must be compatible with the Philips Sonicare system; replacement is easy, but check the availability of the selected heads.

What does QuadPacer mean?

This is a timer that reminds you at 30-second intervals to switch quadrants of your mouth to clean all areas evenly.

How long does the battery last between charges?

The battery lasts for approximately 14 days of brushing with regular use, making it easy to use in everyday life and on the go.

Is it suitable for people with braces?

This model does not have a special mode for orthodontic appliances, however, the standard sonic mode offers gentle brushing.

Description updated: October 2026

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Why buy from ENAA?

• The descriptions are designed neutrally, with clear summaries of benefits and functionality; we always leave the decision to the customer.
• We offer the fastest delivery in Slovenia - more than 95% of orders are delivered the next business day.