Yeh I did think at first a firmware mismatch on the batteries but after reading this bit I circle below.
I can honestly say all phantoms I have and have owned I have never updated a battery,,,I know during firmware update it goes through things showing a % logo when install in progress,,I can remember the battery being part of it,,I'm however not 100 % sure if this process updates any battery inserted in the future, and then again I've never had any prompts to update a battery so presume it's done automatically through software ,,I've heard of people updating there battery but it's always sort of stumped me,I got no computer so no assistant 2 in my books but everything works fine,,,so hanging on the fence about batterys being different if not updated and stuck in a p4 to fly,I've brought battery from stores and just charge and fly no issues..
I'm no tecanogical brain surgeon so probably not know what I'm going on about but I never updated battery,,
If I really wrong with this please inform me so I know what I miss out on lol
Bottom line it's just my take on battery update
Confused myself
4 batterys, and at throttle only makes me point towards esc or 3 in 1 board but this drone is a replacement, it's not out of the blue to receive a faulty drone,its happen before here ,I think you should upload that flight here and others that can read software graphs might be able to pin point what happen under power,,
View attachment 121455