I recently replaced the head, and everything inside appeared to be in order

Philips Sonicare 2100 vs 1100 Included in the package are one Philips Sonicare 1100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger (wall adaptor not included). Each charge has a battery life of two weeks and an indicator light. Easy-start gradually introduces you to electric brushing by increasing its power. Compared: Philips Sonicare 2100 and 1100 Its compact, ergonomic form and well-known head shape provide you with all you require and nothing else. The Sonicare technology produces a perceptible improvement by gently pulsing water between your teeth. This toothbrush's ergonomic design makes brushing easier and more comfortable. The 2 minute SmarTimer with QuadPacer ensures dentist-recommended brushing times. 14-day maximum battery life. One Philips Sonicare 1100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger are included in the kit (wall adaptor not included). A lengthy battery life and a battery indicator light: A single charge lasts for fourteen days. The SmarTimer with QuadPacer guarantees the dentist-recommended two-minute brushing period. Its compact, ergonomic form and familiar head shape give all of the necessary features. Water is pulsed lightly between your teeth by Sonicare technology, producing a significant change. The transition to electric may seem daunting, but you're in excellent hands with this brush. Compared: Philips Sonicare 2100 and 1100 The sleek ergonomic shape makes brushing easier and more comfortable.

You may alternatively choose a softer cleaner with two power levels. The package contains one Philips Sonicare 2100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger (wall adaptor not included). Easy-start gradually raises power to ease the transition into electric brushing. Two degrees of strength provide a gentle yet effective clean. The battery can last up to fourteen days. Included in the package are one Philips Sonicare 2100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger (wall adaptor not included). A lengthy battery life and a battery indicator light: A single charge lasts for fourteen days. The SmarTimer with QuadPacer guarantees the dentist-recommended two-minute brushing period. Its compact, ergonomic form and familiar head shape give all of the necessary features.

This toothbrush's ergonomic design makes brushing easier and more comfortable. The 2 minute SmarTimer with QuadPacer ensures dentist-recommended brushing times. 14-day maximum battery life. One Philips Sonicare 1100 electric toothbrush, one SimplyClean (C1) brush head, and one USB charger are included in the kit (wall adaptor not included). The move to electricity may be scary, but you are in excellent hands with this brush. I've only ever had a single unit type. Remove the brush head and unscrew the handle cap. It looks like a unit. In rare cases, the item can be revived by removing the dirt from the handle and brush. If not, the brush unit should be discarded and replaced with a new one. They are referring to the bristles' ability to vibrate rapidly enough to spray water. This statement does not occur in the description for the subsequent version of that model, which could lead someone to imagine a nonexistent function.

Sonic Advanced technology is utilised by Philips Sonicare toothbrushes to gently pulse water between your teeth, thereby breaking up and removing plaque. I recently replaced the head, and everything inside appeared to be in order. It has only been mine for about a year.