Batteries are sorted by Duracell criteria.

Hello, I tried to load two relatively new Duracell batteries with the unit.
After about an hour, then started the red lamp of the charger will flash,
this is the signal that the batteries are defective. Without second charger
I would have to dispose of the batteries because the Duracell battery charger they will no longer accept.
I then put the batteries in my Varta LCD Charger charger and she has done without complaint
loaded. In my Radlampe the batteries have then again 8 hours served its purpose.
Meanwhile, I have charged the batteries with the charger Verta repeatedly without any problems.

I can not check the criteria here batteries appear to be defective,
maybe the customer should purchase a new battery?

Here are two alternatives for charging AAA / AA Batteries:
The Varta LCD Charger charger, it charges all batteries in a very fast speed, without complaining.
It is therefore certainly a little less to conserve battery charge, than a slow charger.
You can always invite only 1 pair or 2 pairs of batteries in the charger.

A good alternative if you want to load only AAA / AA batteries, and the Techno Line BC is 700 charger. While it also sorts of batteries, but it is much more transparent. It is also to conserve battery charge, so you can adjust different charging rates and unloaded and loaded batteries.

Probably the best batteries are currently the Sanyo Eneloop XX.