Already in his second of the loader worked well no longer correct; Whenever you plug a second battery for charging (which is the whole point of a 2-channel charger) switcht the red LED on the other channel, which tells you that the battery is being charged therein, on blue. I tried it in different combinations with multiple batteries; apparently can no longer red both LEDs at the same time but only one at a time. Unfortunately, I do not even then, if is now loaded on both channels or only one.
I have decided to stop using the charger; firstly because I see the enormous heat development as a security and the stench as a health risk; on the other hand I am afraid that he scrapped my batteries. Buy some prefer for 20 2 chargers Patona (qid = 1425240100 & sr = 8-1 & keywords = Patona + 3in1 + F970), since you have then at least as safe)
Greetings
Moder Master