Original 200W HP Zbook 17 G3 AC Adapter Charger + Cord
[CAIEPO-HP-19.5V-10.3A-4.5-3.0mm-16]

Having this spare power adapter is really useful when I have everything plugged in and tugged away in the office and at home. I can just bring this on the road to charge my PC without pulling wires out from the back of the desk.