I seem to have forgotten, is there a battery on the motherboard or not?
As the "chief computer expert" in the class, I regularly had to set up the equipment before lessons, specifically connecting the laptop, projector, configuring everything, and starting the presentation or something similar. Sometimes I did this right when an oral quiz was being conducted in class, and I could avoid it :) Although sometimes I had to do it during the break.
Added 2 minutes later
and what do I need them for? There's not much good stuff there.
Bow down and hear our cry,
Our earthly rulers falter,
Our people drift and die,
The walls of gold entomb us,
The swords of scorn divide,
Take not thy thunder from us,
Take away our pride.
G.K. Chesterton: English Hymnal