After about $ 8 battery-powered Billigsttrimmer mechanically gave up the ghost after more than 5 years, I have now tried all sorts of devices to search for a replacement, more expensive and cheaper, none of them has convinced plucking and tweet, uneven cut, good results over it only after repeated go... No picking and tweet at least for the 3-day beard this device seems really perfect to go fast without many times about it, even, relatively quietly. Compact universal power supply for all voltages. Only two minor criticisms: 1. No charge indicator for the battery (only LED that power adapter is connected), no charge termination, goes only over time (at the present time almost an anachronism, something really does not cost anything more) 2. Detaching and Attaching the adjustable Kammrechens (for cleaning and use of the fold detail trimmer is resolved fairly primitive, let's see how long that holds (well, there are yes 3 years + 1 year extra for online registration on).
Update 05/28/15: Absolutely gorgeous is the runtime on battery :-)