This is my third Brita water filter and also the series with the best material quality. With the result of the Brita water filtration I've always been very satisfied. Unfortunately, I was disappointed with regard to the quality of the built-in battery for the display of this part. After 3 weeks, the display on the screen faded and could no longer be read. A return seemed to me personally too costly and so I replaced the built-in battery, which is possible in this embodiment of the water filter with some care and skill themselves. Such a rapid failure of the battery should not occur in a just newly acquired part, so are it here in a device that knows how to please in all other respects, an asterisk deduction. Incidentally, the battery performance of the ads in the water filter I purchased several years ago show over the entire period of time no deficits, so go yet.