Horizon Zero Dawn - Ancient Armory (Before final battle)
Power Cell 01: Underground Bunker
Power Cell 02: All-Mother Temple (This Video)
Power Cell 03: Maker’s End (This Video)
Power Cell 04: The Grave Hoard
Power Cell 05: GAIA Prime
Finding these items and completing the side quest Ancient Armory will unlock the powerful Shield Weaver armor, which renders Aloy nearly invincible for a time while wearing it. The power cells are presented below in the chronological order they can be obtained in during the main quest line.