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If you're too lazy to visit a power plant, why not make your own fusion core from highly unstable materials?Fallout 76 Vault Dweller's Survival Guide p.105

The fusion core is a type of ammunition in Fallout 76.


This section is transcluded from Fusion core. To change it, please edit the transcluded page.

Standardized fusion cores are a high-grade, long-term nuclear battery used for military and commercial applications before the Great War.[1] Used by civilians to power a multitude of devices, from automobiles,[2] to generators,[3] the military instead used them for warfare, supplying power armor and some Gatling laser models with energy. Standard core interfaces were developed across the board to allow for power armor frames to use cores salvaged from weapons or generators.[4] The fusion core also can be hooked up to certain melee weapons via jumper cables.[5]

Another benefit is that cores can be set to overload, for use as improvised explosives or to deny a power armor suit to the enemy by destroying it.[6]


Fusion cores are used to power and activate suits of power armor as well as providing ammunition in certain weapons, such as the Gatling laser, which utilizes them; each fully-charged core provides 500 shots.


Standard fusion core
Build at:
Learn Method:
Known by default
Fusion core (1)
Ultracite fusion core
Fusion core (2)
Build at:
Learn Method:
Ultracite fusion core (2)

Weapon/armor using this ammunition


Can be looted in a variety of places
  • Scavenge for power armor: On every suit of power armor, one will find a fusion core at quarter charge.
  • Search for fusion generators: Fusion generators encountered while exploring may contain a lootable fusion core.
  • Ammo boxes may contain fusion cores when using the Scrounger perk. Steamer trunks may yield cores, as well as other containers in a military-themed location.
  • Dropped by: Sentry bots, radtoads, anglers, feral ghouls.
Quest rewards
  • Successfully finishing Line in the Sand rewards two fully-charged fusion cores.
  • Successfully completing Daily Ops with an equipped weapon that uses fusion cores will reward additional, fully-charged, cores.
Fixed spawn areas

Fusion cores are susceptible to physics, so they may fall off platforms and may not be in the exact location listed below. Additionally, other players may loot fusion cores, preventing them from appearing.

Ash Heap
Location Location description
The Sludge Works Inside a small basket near the eastern pier.
Cranberry Bog
Location Location description
Big Bend Tunnel In a fusion generator in the storage room with the mole rats.
Fort Defiance In the locked armory on the third floor, on the bottom row of a metal shelf in the southeast corner.
The Forest
Location Location description
Arktos Pharma
  1. On the fourth floor, in the room with a large bay window above the garage area, on a countertop near the power armor.
  2. In the same room, on a wall mounted cabinet to the right of the power armor.
  3. Inside the loading bay's fusion generator.
AVR Medical Center In the fusion generator below the cafeteria.
Bleeding Kate's Grindhouse In the fusion generator, by the makeshift movie screen.
Charleston Capitol Building
  1. In a fusion generator in a room at the western end of the lower level.
  2. In a fusion generator in the flooded room at the eastern end of the same floor. (Lower level)
Fujiniya Intelligence Base In the generator room, behind some machinery in a console near the stealth research lab on the lower level of the base.
Hornwright Industrial Headquarters On the top floor, inside the fusion generator.
Kanawha Nuka-Cola plant
  1. Inside of a generator in the back of the factory floor.
  2. Inside of a generator on the roof of the plant.
  3. Inside the locked cage next to the generator room.
Mama Dolce's Food Processing Inside the fusion generator of the small warehouse immediately southwest of the factory.
Morgantown Airport Inside the fusion generator within the 'Bot Shop' hangar.
New River Gorge Bridge Behind a locked door in the west maintenance section, in a storage room on the right immediately after the entrance, on a bottom metal shelf row.
Poseidon Energy Plant WV-06 Inside the basement, inside a locked room with a wall cabinet, on top of the lower cabinet, near a blue basket.
Poseidon Energy Plant yard Next to the workshop, on a table to the right of the fusion core processor.
Relay tower EM-B1-27 On top of the central control panel, along the wall closest to the repairable terminal.
Riverside Manor Sitting on a cart with a microscope in the basement near the weapons workbench.
Wade Airport At the top of the air traffic control tower, on the desk, to the right of the broken console.
WV Lumber Co.
  1. In the fusion generator in the lower level of the central lumber mill building on the west side of the complex.
  2. In the warehouse near the modified limousine, on a desk with a broken terminal, on the left.
Savage Divide
Location Location description
Palace of the Winding Path On metal shelves next to the generator in the basement.



PCPC Playstation 4Playstation 4 Xbox OneXbox One Before patch, fusion cores would replenish to full charge upon joining another world.[verified]



  1. The Sole Survivor: "I'll help if I can."
    Preston Garvey: "What you'll need is an old pre-war F.C., a standardized Fusion Core. Your high-grade, long-term nuclear battery. Used by the military and some companies, way back when. And we know right where to find one..."
    Sturges: "But we can't get to the damn thing. It's down in the basement, locked behind a security gate. Look... I fix stuff. I tinker. Bypassing security ain't exactly my forte. You could give it a shot."
    (Preston Garvey and Sturges' dialogue)
  2. Berkeley Springs terminal entries; Dr. Barnaby's terminal, Medical Notes 10.31.77
  3. The Sole Survivor: "What're you looking for again?"
    Preston Garvey: "A Fusion Core. It's kind of a fancy battery. They used one here in the museum to power the exhibits, a long time ago. There's one in the basement, behind a security gate. You'll need to pick the lock or hack the computer to open it."
    (Preston Garvey's dialogue)
  4. Sturges: "That armor may be old, but it's got a standard interface. Just jack the Fusion Core in."
    (Sturges' dialogue)
  5. Electro-Fusion modification for the Hatchet
  6. The Sole Survivor: “The damage... it's deliberate. They set the fusion cores in their armor to overload. That's what caused the blast. But why?
    Spoken during The Lost Patrol