I have only put one 18650 in the panzer to check if it rattles and shakes I purchased a plume viel to match the panzer so I haven't actually vaped with the new mod or that 18650 without the other? If it was fine I was just gonna split the two anyway and buy new if I even wanted to use my box again? I've not had any problems at all with the coils or anything in the box mod at all with the battery's or that coil???