I'm sitting ten feet away from a large metal box-shaped object the size of a small car. This imposing object has a large, heavy switch on one side, and bears the logo and name of the Liebert Corporation. Inside are noxious acids and heavy metals even you would hesitate a moment to feed to your siblings. The Liebert, as it is called, is a giant lead-acid battery. It hums (it doesn't know the words). It rumbles. It shakes. If the power goes out, it thunders.

And the lights stay on.
More importantly, the computers stay on.

Personally, I think that having two hundred and eighty eight cubic feet of lead-acid battery looming a few feet away from me is somewhat neat.