Battle Armor is a technology that is unique to the Royal Naboo, and can be researched at the Fortress in Tech Level 3. It costs 225 Food and 200 Carbon, and gives +25% Hit Points to all Fortress units except the Air Cruiser. It is a requirement for Shielding.

This technology makes the player's Bounty Hunters, Royal Crusaders and Cannons sturdier, giving them an edge in combat.

"The only Tech Level 3 technology available from the Fortress, Battle Armor grants a bonus to the hit points of all units produced at the Fortress, including Bounty Hunters, your civilisation's unique unit, and Cannons."
—Manual description