In one of my battery cell there is a deviation of 0.15 . I already drained the battery completely a few times and recharged it. Unfortunately it remains the same deviation.
It has only been charged 34 times. I wont be using this anymore as i am afraid it soon will shut down the drone in flight.

Can someone advise if this is normal and if i should file a report?

Hi dronybaloney, we're sorry to read the troubles. If the battery is under warranty period, please kindly contact our support and start a case from here: https://www.dji.com/support The designated team will take care of it.