What astonishes me is that here a lot of reviews to the smaller brother, the 700 BC are, and so far only one for BC 900. That is why I want to break a lance for the BC 900 here. Many batteries cope with 1000 mA charge current, and only the BC 900 utilizes this also. I have different battery types (AA NiMH, including Eneloop) tested different manufacturers so. The measured capacity voted amazingly precisely with the printed. When considering what cost these batteries and how easy it is to reduce its service life due to incorrect handling, this device expects all. The manual is pleasantly short, you should read carefully. The feel of the 3 keys initially seems a bit cheap, but this impression is quickly dissolved with me on. Trying to load already charged batteries again, ends after a very short time with the indicator "Full" each per battery. So clearly and unambiguously make the fewest devices. If there was the machine in a version for 8 AA batteries, I would have still bought prefer.
Whoever places high demands on its batteries, sooner or later ends up in any case in such a device. Whoever buys the same and not only as a low-cost part of the supermarket, definitely saves money.