It is day and night with this new brush. The brush has held over 10-15 brushings (I did not count), while remaining in full speed to the end. There is therefore a Regular brushing whose quality does not decrease according to the battery charge. This morning, I felt notice a decrease in intensity. After two minutes, the brush is cut altogether. With my old brush rotations continue, decreasing for several days. While remaining usable, so the old brush teeth cleaned less. Here, it's perfect.
When I see the price changes of Oral B to another, I confess I do not understand why some are so expensive. The goal is to brush our teeth, this brush (the cheapest of Oral B on amazon at the time of my purchase) is just perfect. Good others certainly have other qualities, but the current brushing my teeth filled my expectations. So I can only recommend!