Ac500 head unit shut down when only one battery reached 0 the other was still at 31%

i was wondering if this was normal first i know i needed to …“resync” the charge levels by running them both down and recharging …and im on that but I always thought the unit would simply stop drawing from one unit and continue with the other battery until it reached 0 ?

@SOZO13 Please check first if the two B300S versions are the latest, 1022.09.
Then please perform a full charge and discharge cycle to see if the situation has improved