Philips Sonicare 4100 Electric Toothbrush — Open Box, Like-New

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GRADE: A+ — Open Box. Like-new condition with original packaging. All parts remain in original factory bags; brush head unused with intact bristles and hygiene cap. Condition: Open Box. Like-new condition with original packaging. All parts remain in original factory bags; brush head unused with intact bristles and hygiene cap. The Philips Sonicare 4100 is a top-rated rechargeable sonic toothbrush for adults. It combines Advanced Sonic Technology with smart brushing features. This open-box unit is like-new and ready to use right out of the box. You get the same performance as a brand-new unit at a lower price. It is from the #1 dental-professional recommended sonic toothbrush brand worldwide. The Sonicare 4100 uses Advanced Sonic Technology to deliver deep, gentle cleaning. The sonic motor generates high-frequency vibrations. Those vibrations pulse fluid between teeth and along the gumline. This action reaches areas a manual toothbrush simply cannot. The result is a significantly more thorough clean with every session. The included C2 Optimal Plaque brush head is key to the 4100's performance. Its soft, flexible bristles are designed for stain removal and polishing. Philips claims it removes up to 700% more plaque than a manual toothbrush. The bristles are gentle enough for sensitive gums. The hygiene cap keeps the head clean between uses and during travel. A built-in pressure sensor protects your teeth and gums every time you brush. If you press too hard, the handle pulses to alert you. This prevents over-brushing damage over time. It is a simple but important feature for long-term oral health. Dental professionals often cite over-brushing as a common cause of gum recession. The 4100 includes several smart timing features to guide your routine. The SmarTimer lets you know when you have reached a full two-minute brush. The QuadPacer pauses every 30 seconds to prompt you to move to the next quadrant. EasyStart gradually increases power over the first 14 uses. Together, these tools build and reinforce an effective brushing habit. Battery life on the Sonicare 4100 is genuinely impressive for everyday use. A full charge delivers up to 14 days of regular brushing. Charging is simple via the included USB charging base. Note that a USB power adapter is not included in the box. The rechargeable design eliminates the need for disposable batteries entirely. Two intensity settings let you customize the brushing experience to your preference. Use the lower setting for a gentler clean on sensitive days. Switch to the higher setting for a more powerful, vigorous brushing session. This flexibility makes the 4100 suitable for a wide range of users. It is a practical choice for anyone upgrading from a manual toothbrush. The brush head replacement reminder is a standout feature for long-term users. The toothbrush tracks how often and how hard you brush over time. When the brush head is due for replacement, it notifies you directly. Dental professionals recommend replacing brush heads every three months. This smart tracking ensures you are always brushing with an effective head. This Sonicare is compatible with all Philips Sonicare C2, C3, and other compatible brush heads. That gives you flexibility to switch to different head styles as your needs change. The handle is rated IPX7 waterproof, so it is safe to use and rinse in the shower. The sleek matte black finish looks clean and modern on any bathroom counter. Learn more about sonic toothbrush technology on Wikipedia's Electric Toothbrush page. Frequently Asked Questions Question 1: Is this Sonicare 4100 truly unused despite being open-box? Answer 1: This unit is like-new with no signs of use. All parts were found in their original factory bags, and the C2 brush head retains its hygiene cap and intact bristles. The handle shows no scratches, wear marks, or any evidence of prior use. It was returned to Amazon without ever being put into service. Question 2: What is included in the box with this toothbrush? Answer 2: The set includes the Philips Sonicare 4100 Series handle, one C2 Optimal Plaque brush head, and one USB charging base. The USB charging base connects to any standard USB power adapter. Please note that a USB wall adapter is not included, but any standard USB-A power source will work for charging. Question 3: How does the pressure sensor work on the Sonicare 4100? Answer 3: When you press the brush against your teeth with too much force, the handle pulses slightly to alert you. This tactile feedback is immediate and easy to notice during brushing. Over time, it trains you to brush with the correct gentle pressure, which helps protect enamel and gums from long-term damage. Question 4: Is the Sonicare 4100 compatible with other Philips brush heads? Answer 4: The 4100 handle is compatible with the broad range of Philips Sonicare click-on brush heads. This includes the C1, C2, C3, G2, and W2 series heads, among others. You can easily swap to a different head style to suit your specific oral care needs, such as gum care or whitening focused heads. Question 5: How long does a full charge last on the Sonicare 4100? Answer 5: A fully charged battery provides up to 14 days of regular brushing based on two-minute sessions twice daily. The USB charging base makes it easy to top up the battery at home or when traveling. The rechargeable design is more economical and environmentally friendly than battery-powered alternatives. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Is this Sonicare 4100 truly unused despite being open-box?","acceptedAnswer":{"@type":"Answer","text":"This unit is like-new with no signs of use. All parts were found in their original factory bags, and the C2 brush head retains its hygiene cap and intact bristles. The handle shows no scratches, wear marks, or any evidence of prior use. It was returned to Amazon without ever being put into service."}},{"@type":"Question","name":"What is included in the box with this toothbrush?","acceptedAnswer":{"@type":"Answer","text":"The set includes the Philips Sonicare 4100 Series handle, one C2 Optimal Plaque brush head, and one USB charging base. The USB charging base connects to any standard USB power adapter. Please note that a USB wall adapter is not included, but any standard USB-A power source will work for charging."}},{"@type":"Question","name":"How does the pressure sensor work on the Sonicare 4100?","acceptedAnswer":{"@type":"Answer","text":"When you press the brush against your teeth with too much force, the handle pulses slightly to alert you. This tactile feedback is immediate and easy to notice during brushing. Over time, it trains you to brush with the correct gentle pressure, which helps protect enamel and gums from long-term damage."}},{"@type":"Question","name":"Is the Sonicare 4100 compatible with other Philips brush heads?","acceptedAnswer":{"@type":"Answer","text":"The 4100 handle is compatible with the broad range of Philips Sonicare click-on brush heads. This includes the C1, C2, C3, G2, and W2 series heads, among others. You can easily swap to a different head style to suit your specific oral care needs, such as gum care or whitening focused heads."}},{"@type":"Question","name":"How long does a full charge last on the Sonicare 4100?","acceptedAnswer":{"@type":"Answer","text":"A fully charged battery provides up to 14 days of regular brushing based on two-minute sessions twice daily. The USB charging base makes it easy to top up the battery at home or when traveling. The rechargeable design is more economical and environmentally friendly than battery-powered alternatives."}}]} The Philips Sonicare 4100 is an ideal entry point into professional-level sonic oral care. It offers a compelling blend of smart features and clinical effectiveness. The EasyStart program is especially helpful for first-time electric toothbrush users. It gently ramps up the sonic power over the first two weeks of use. This reduces any initial sensitivity and builds confidence in the brushing routine. Buying this open-box Sonicare is a smart way to save on a proven toothbrush. The unit is like-new and functions identically to a retail-sealed product. You get full sonic cleaning power, the smart timer, and the pressure sensor. Everything is included and factory-fresh, so there is nothing to compromise on. It is a genuine value for anyone who wants a quality rechargeable toothbrush. If you are looking for more ways to upgrade your daily routine, browse our full range. Explore our Personal Care Collection for more open-box deals on top personal care brands. We stock a rotating selection of like-new and graded items at significant savings. Every item is graded for condition before listing, so you always know what you are buying. Shop with confidence and find the personal care tools that fit your lifestyle. Brand Philips Sonicare Model HX3681/24 UPC 075020100764 Urban Supply Plus · Every item professionally inspected & graded · SKU LPNO456237688 Show more