lipo voltage diff between cell

OK Brian, but i don't think that's dirt in the connection, because when the pack is connect to the charger by the balancer harness or if i take a multimeter to check it, i obtain the same reading. No matter if i pt the multimeter lead IN the balancer connector or on the tab on the connector

Anyways, i've balance the pack this morning, and now, i'll put it back on the charger and see how it'll be at the end of the charge.

Is the fact to run with an unbalance cell in a pack could cause it to puff????