Review title is Typical, excellent Sonicare product [SEP] I've been an engineer forever and an ER nurse for 38+ years; I know hype and BS at first glance and diplomacy has never been my long suit.  I've been using a Sonicare toothbrush for many years.  It was initially recommended by my, superb dentist  dentist, a man who chairs the dental program at a major NYC medical center.  I suffered from the beginnings of gum disease and, a month after using a Sonicare toothbrush, it was gone.  When I briefly stopped using it, it came back.  When I started using it again, it went away again.  The engineering and construction of the Sonicare products is impressive; very few products, of any sort, are made this well.  This battery model - which I plan to use while RVing - is another example of the company's superb products.