Shield battery

The shield battery is a protoss support structure. Its core contains a khaydarin crystal that absorbs and stores local psionic energy. The stored psi is transferred to protoss units via the energy spokes, allowing plasma shields to be recharged rapidly. While the battery has a limited energy capacity, it will steadily recharge itself over time.

Abilities

 * Recharge Shields
 * The shield battery transfers it's energy to any friendly protoss unit's shields through its spokes. The battery rapidly recharges allied shields, but only has 200 energy at a time, and must be allowed to recharge once it is depleted.

StarCraft II
Karune has said the shield battery will not be available in multiplayer StarCraft II games, suggesting it will be available as a special structure during the campaign.