Doubler

Doubler is a Persistent Team Power-up that will be carried by the player until they are fragged. Team Power-ups are not limited by time and grant their abilities passively. It doesn't drop from player when he or she is fragged, instead it reappears back at the team's base.

In Quake III: Team Arena, the Doubler Power-up grants a +100% damage bonus, but in Quake Live it is modified to grant a 50% damage bonus on every hit you score, also its name changed to Damage. In the former, it can be used for higher propelling Rocket Jumps, but in Quake Live the blast force is capped. Therefore, higher Rocket Jumps are impossible with Doubler or Quad Damage in Live. Players generally prefer to use the Doubler with rapid DPS or raw area blast weapons like the Chain Gun or Rocket Launcher.