I have 2 Traxxas ez peak chargers and love em. I run 3S lipos and every now and then I have a problem with both chargers. When I balance store it will get to 3.8 or 3.79 per cell and run for ever like its trying to balance before finish. But it will stay there for a long time. Most of the time if I switch the battery to the other charger and start the balance store over within 2 minutes it beeps done. sometimes no problem at all and sometimes it runs way too long like you know it should have finished but doesn't. I even bought plastic safe contact cleaner for the balance plug figuring maybe it was dirt messing with the balance board contacts. I bash dirt only NO MUD OR WATER. Any ideas? Oh and I NEVER have a problem balance charging with either one just storing.
I have come across this, when the voltage gets close the charger REALLY dips amps, start over on the same charger see what happens. That usualy does it for me.
Ya, my lipos do the same. At that point, I just call it good.