Fusion Core

A fusion core is a type of ammunition in Fallout 4 and Fallout 76.

Background
Standardized fusion cores are a high-grade, long-term nuclear battery used for military and commercial applications before the Great War. Used by civilians to power a multitude of devices, from automobiles, to generators, 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. The fusion core also can be hooked up to certain melee weapons via jumper cables.

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.

Standard core


The standard fusion core, used in weapons, power armors, and generators.

Ultracite core


A standard core augmented with ultracite technology, this core can only be used in conjunction with a weapon adapted using the same technology, like ultracite Gatling laser.