Actually a pretty good charger, but with weaknesses and short-lived

Had I bought this charger in December '13 to March '15 and more or less regularly in use (every 2 weeks). I invited so mainly Eneloop batteries for my flash units. At the last use he invited 4 pcs with 700mA to Full is displayed when I lodged start the next 4 pcs charger every few seconds a new, just before it abschaltete showed it 39 39 35 in the display and rebooted. So a total failure since no charge possible. On the Internet I found postings and also here reviews and videos with exactly the same error, thus seems more often to come for the identical model of Voltcraft (Conrad).

Basically, this charger is very good, it has all the necessary functions for NiMH and NiCd batteries, as well as adjustable current and capacitance measurement to detect irreparably damaged battery.
Some negative points but I noticed, for example, developed the device a fairly high intrinsic thermal loading of 4 batteries with 1000mA, this leads in conjunction with the normal heating of the battery is cooled to a charge interruption due to high temperature up everything again.
The defective unit can I return it to Amazon and get a new one, but I'm afraid it will hold on the life not very long. Overall, Mixed feelings, it would have broken a few months later would be more than 40 in the bucket.