For an overview of fusion cores, see fusion core.

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 an ammunition type 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] A specialized variant of the fusion core was developed for use in certain plasma weapons.[6]

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.[7]


Fusion cores are used to power and activate suits of power armor and as ammo in certain weapons, such as the Gatling laser, which utilizes fusion cores as its ammunition; 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


  • 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 box 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 spawns
  • Three fusion cores can be found at Arktos Pharma:
    • On the fourth floor, in the room with a large bay window above the garage area, on a countertop near the power armor.
    • In the same room, on a wall mounted cabinet to the right of the power armor.
    • Inside the loading bay's fusion generator.
  • AVR Medical Center - In the fusion generator below the cafeteria.
  • Big Bend Tunnel - In a fusion generator in the storage room with the mole rats.
  • Bleeding Kate's Grindhouse - In a fusion generator, by the makeshift movie screen.
  • Two fusion cores can be found at the Charleston Capitol Building:
    • In a fusion generator in a room at the western end of the lower level.
    • In a fusion generator in the flooded room at the eastern end of the same floor. (Lower level)
  • Fort Defiance - In the locked armory on the third floor, on the bottom row of a metal shelf in the southeast corner.
  • Hornwright Industrial Headquarters - On the top floor, inside the fusion generator.
  • Palace of the Winding Path - On metal shelves next to the generator in the basement
  • Wade Airport - In the air traffic control tower, on the desk.



Icon pc.png Icon ps4.png Icon xboxone.png 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. Plasma core in Fallout 76
  7. 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
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