Fusion core (Fallout 4)

Fusion core is an items type in Fallout 4.

Characteristics
Fusion cores are used to power and activate Pre-war suits of power armor. Each core provides twenty minutes of power armor use. Fusion cores will drain faster if you are sprinting in power armor.

Fusion core lifespan is extended by 10% if you have found the Repair bobblehead.

Locations

 * One can be found in the Museum of Freedom's lowest floor, Sturges asks the player character to retrieve it, but can be taken without getting the quest nonetheless.
 * Another is in ArcJet Systems in the room where the player character can restore power to the elevators.
 * Four can be found in the ammo box next to the safe in the ruined building with four burnt out suits of power armor during the "The Lost Patrol" mission for Brotherhood of Steel
 * One can also be found in the Mole rat den under the Red Rocket truck stop.
 * One is located in the basement of USAF Satellite Station Olivia.
 * One can be found in the first fighting area of the synths
 * One can be found in the military crate at Robotics Disposal Ground
 * One is located in Fort Hagen
 * One is located in Mystic Pines (Northeast of Lexington) in a room towards the back. The door to this room is locked (Advanced) and requires 1 point in Locksmith perk to pick.
 * One can be found at the Starlight Drive In in the building behind the screen, with a locked (Novice) door.
 * One can be found at the bottom of the Super-Duper Mart in a generator.
 * One can be found in College Square in the building opposite the hanging man, near the wooden bridge. Go up the stairs, it's on the desk by the toolbox.
 * May be dropped by sentry bots.
 * Up to five can be found in The Castle's Armory (including from The Sarge sentry). Also mortar turrets.
 * Several may be found at Chestnut Hillock Reservoir in an ammo box outside the building, by the couch and lantern to the left of the door.
 * Four can be found in Doc Crocker's house
 * One can be found at the Federal ration stockpile in the generator room behind a locked door (Novice)
 * Two can be found at Greenetech Genetics on the top floor behind a security door. (Master)
 * One can be found in a trash can at West Roxbury station
 * One can be found on a mutanted swan at Swan's Pond, the swan has a large amount of HP and can kill you in a few hits, so be prepared.
 * Two can be found at Wilson Atomatoys Corporate HQ. First one is next to a ammo box at the entrance outside, for the second one after you first enter go to the room on the left it will be in a generator to the right. Beware of super mutants.
 * Four can be found on a rooftop opposite South Boston police department in an Ammo Box.
 * One can be found on the main road north of Poseidon Reservoir at a military checkpoint, in a power armor.
 * two can be found at Four Leaf Fishpacking plant one in a generator and the other behind a security gate, on a shelve.