Power/battery life: See this (and scroll towards the recent posts there, there has been some movement dependent on distro):
BIOS:
Firmware Version: 03.09
Latest is 3.18, but has a known issue with docks (and HID devices that hang off them) :
FW is aware and tracking it:
so you might want to only update to 3.17 until this is addressed:
While we’re at it, this ADM graphics driver issue is still affecting folks (multiple threads here), Tracked upstream at:
TL;DR: You might want to add amdgpu.dcdebugmask=0x10 to your kernel command line for now.