A problem a bit annoying when I put the batteries charged, the move makes the charger causes false contacts, and charge off diodes come back on, and if you move the batteries directly, it is still worse, and this on the 2 with 6 different modules and batteries. I cleaned the contacts of the charger and batteries, same .. So, I tightened up a bit 2 contacts on each charger module and it goes a little better.