The IMAXX B-6 charger and copies have a known balancer issue that's related to the poor accuracy of its voltage measurement. There's a big thread on RC Groups about fixing the prob - replacing some orig low quality internal resistors with better ones to improve voltage measurement and balancing.


Some of what you're seeing otherwise is prob age related, I haven't seen complaints about the Quattro having inherent balance issues. If it does this with a good lipo, then I'd suspect the charger may have a prob.

Does it happen in all 4 ports?