Good charger independent channels

Not easy to find a good smart charger for 9V battery, this one is doing brilliantly and often in the best tests found on the net.
It can charge two batteries of 2 independent channels with end of charge detection mode (which therefore do not damage the battery when it reaches full capacity) automatic.
I took the batteries from the same brand Ansmann which display a good score with a minimum of 270mAh, they are among the highest with a cetificat German TÜV for quality.
By testing these batteries Ansmann end of charge (green LED) displays my voltmeter 9,7V.
The charger is basic in use, the battery is plugged puts it: red light all the time to load, and then automatically switches to maintenance mode to pass the green LED. The batteries heat up very little that's perfect.