Hi Others who have experienced their battery charger does not work? I have two, and one lights red when I connect a battery and the other lights green no matter what I do. The green does'nt charge the battery ... Also the small white battery indicators sometimes keeps lightging, until I press them some more times... Weird..!
try swapping your power cables between the two of them and see if the behaviour changes. I had a bad power cable and it was behaving the same way.
Stefan if you haven't done it yet you should create a ticket with Freefly. support@freeflysystems.com