Since this seems to be the only channel to get support from Microsoft I'll state my question here.
What's wrong with my Lumia 950 XL battery?
Battery drains in idle (just sitting on the table) from 96% to 64% in 90 minutes and the phone runs quite hot. It is also almost impossible to charge the battery to 100%. The drainage is the same even I have not opened any app after reboot. Hello is not in use. There's no system updates pending or any app being downloaded or updated.
From settings Battery Use measurement tool shows that the most power hungry apps are Mail and Calendar, Edge and Facebook, although all of them uses battery as background service less than 10% (measured period 1 week). The battery use breakdown shows that System takes 23%, Display 63%, WiFi 8% and Cellular 6% and of those 87% in use and 13% in background.
The battery should last more than few hours after full charge.
Another weird phenomena: I'm having Low storage warnings even there's only one third of the storage space used (9.6 GB used out of 29.1 GB). There's no SD card in use.