I bought 2 years ago for the first time a Sonicare FlexCare toothbrush ultrasonic, 900 Series with charger and UV sterilization. The cleaning performance of the toothbrush is perfectly ok and convincing. After 1 1/2 years they were at power unfortunately no sound more of themselves, no matter what I tried also. I have then bought a replacement handset of the same species without charging station and brush, which after just 1 year has once again broken. It's been the 2nd toothbrush of this series, which has such a short life and I've used them as an individual and also with care behandelt.Sie was until yesterday still in order, had to be loaded and this morning she could no longer turn on. Just about the toothbrush and brushing 1 year and then defect is definitely too short and not speaking of good manufacturing quality. I also find it strange that Philips at the high price is not at least one lithium ion battery installs, who has no memory effect.