After several months of use the chargers has recognized many batteries as "defective". These are then no longer even loaded. At first I thought it was up to the battery, but now I have fed it with new batteries of different manufacturers. Again, after 1-2 charge cycles shows the charger "zero".
Am no longer so sure ...
Addendum March 2015: The problem RECOURSE continue functioning batteries are treated as "defective". These batteries could be in simple chargers without costly defect inspection then normal load.