Own the charger now for about 1 year and am fully satisfied with the loading speed and capacity of 2700mA battery. Lately, however, piling up the cases that batteries (Original Varta) will no longer be loaded from the device (red charging lamp blinks). From 16 batteries I have now 5 failures. This is something disappointing. So full marks for new batteries, but unfortunately, too many failures, so devaluation