The Shield Battery is a structure that restores Protoss shields. While it was always part of the multiplayer in Brood War, it was only introduced to StarCraft II's multiplayer in Patch 4.0.0, filling the gap in Protoss defensive capabilities left by the removal of the Mothership Core and its Photon Overcharge spell.
A Shield Battery can restore shields of a single friendly unit or building within 6 range. Friendly units and Photon Cannons are automatically targeted. Other buildings may be targeted with a right-click. Shields are restored at 36 points per second, draining 1 energy from the Shield Battery for every 3 shields restored. Hence, a Shield Battery with full energy provides up to 300 additional hit points for nearby fights.
With their lack of mobility, Shield Batteries are generally most useful when placed in direct support of a defensive position, such as at the top of a ramp or near a Nexus the Protoss player is trying to defend.
Against certain types of worker harassment, such as a single Oracle or Banshee, a Shield Battery in the mineral line can keep the workers alive for some time (9 or 13 seconds, respectively), giving the defending player valuable time to react. Two Oracles or Banshees, however, can one-shot Probes, making Shield Batteries ineffective.
Certain aggressive builds, such as proxy Void Rays abusing a cliff, profit from Shield Batteries supporting wounded units, amplifying the pressure a limited number of units can exert. Shield Batteries are especially prominent alongside a Cannon Rush in PvZ if the Protoss tries to extend the rush from the Zerg's natural into the main base.
Shield Batteries may also be used to fill a wall temporarily, i.e., started in the gap of a wall but cancelled before they finish warping in. This is most common in PvP to stop Adept Shades from bypassing a wall. The damage one or two Adepts can cause in a worker line or scouting vital tech will easily outweigh the 25 minerals lost from this tactic. Pylons may be used for the same purpose but finish more quickly, allowing less time for cancellation.
- The following are not valid targets for healing:
- Units or buildings already being healed by another Shield Battery
- Units or buildings which have not finished warping in
- Units being recalled
- Enemy Shield Batteries not in vision that are healing units in vision are revealed. This is similar to how enemy Siege Tanks attacking you from outside your vision range are revealed to you.
- Two Zerglings out-damage the build speed of a Shield Battery. To fill a wall against a Zergling attack, a Pylon is preferable.
|Patch 4.0.2 Balance Update |
|Patch 4.1.4 Balance Update |
|Patch 4.7.1 |
- Blizzard Entertainment (28 November 2017). "STARCRAFT II BALANCE UPDATE -- NOVEMBER 28, 2017". Battle.net.
- Blizzard Entertainment (29 January 2018). "STARCRAFT II BALANCE UPDATE – JANUARY 29, 2017". Battle.net.
- Blizzard Entertainment (20 November 2018). "STARCRAFT II 4.7.1 PATCH NOTES". Battle.net.