first report with two new OEM 1150 mAh yuneec branded batteries
these are the very first battery cycles assuming the ebay seller was truthful ( batteries did look new)
battery #2 started at 100%, flight lasted 5:15 landed at 15%
battery #3 started at 97%, flight lasted 5:30 landed at 15%
....
I read some of your battery messages in two forum threads. I wonder if your drone is not damaged, maybe it has some short-circuit which causes higher battery consumption.