The Plasma Missile Battery is a Scrin anti-air defensive structure, similar to a SAM site that fires searing hot plasma discs in volleys at enemy aircraft, in a similar manner to Photon Cannons on the ground. They can be upgraded with Tiberium shard launchers, boosting their damage output by 160%. This powerful anti-air defense represents a significant threat to any human aircraft that venture close to it, even the stealthed NodVertigo.
As if energy disks weren't enough to sear through aircraft frames, Shard Launchers allow Plasma Batteries to fire lethal shards of Tiberium at extremely high velocities to penetrate and destroy aerial threats (Ctrl+S).