i have a fairly new dynamite passport ultraforce charger...it has only been used a few races now...never smells or feels hot,yet it will randomly quit charging my 2s lipos 5900 and 6600 and revert back to the menu screen...no error codes and will start right back up when selections are made...you never know if it's gonna charge the battery to the finish or not though

very frustrating

What rate are you charging the batteries?
How long are you charging the batteries?
Are you charging in FAST mode or are you balancing them?
Anything on the screen that tells you how long you charged them or Mah?

i only charge at a 1 to 1 rate...6600/6.6 and 5900/5.9...always balancing them...usually only a matter of minutes

no ideas,i think it's just got an issue from the factory that needs repaired