At 18% load (projector off, but ART cameras connected), the projector batteries will last about 80 minutes.

At 47% load (projectors on), the batteries will last aout 11 minutes.

With the head node, render node, ART computer, DVI extenders, and Cisco Ethernet Switch connected, the rack runs at about 40% load and the battery estimates about 24 minutes of battery run time if power is lost.