my battery is 1 week old is this normal battery cell voltages when its 100% charged the difference is 0.09

The voltage different is less than 0.1V, so it's in the normal range, but you can still try to fully charge and discharge the battery to check if the level is corrected.

How far should I discharge

Data from healthy Drones

In early weeks also my 2nd battery gave me issues on 1st cell and now it's ok... Now it's time to deal with my oldest battery... It was always ok but now 1st cell voltage deviations are becoming concerning.. I've tried deep discharge cycling 2 times and still don't get the cell balancing

How low should I discharge the battery to when doing a deep discharge

clarky0150 Posted at 2016-2-21 07:19
How low should I discharge the battery to when doing a deep discharge

Down to 5%