Microfusion cell (Fallout: New Vegas)

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For an overview of microfusion cell ammunition types in various Fallout games, see microfusion cell.
Gametitle-FNVGametitle-FNV GRA
Gametitle-FNVGametitle-FNV GRA

The microfusion cell is a type of ammunition in Fallout: New Vegas.


The microfusion cell model No. 1040 MFC, a medium-sized energy production unit, is a self-contained fusion plant with an output of 1040.8 VDC used as ammunition for energy weapons. It is the primary energy source for rifle-type energy weapons, and is commonly available within the Mojave Wasteland. Microfusion cells are more powerful than energy cells, but are less capable of rapid discharge than electron charge packs. Microfusion cells can also be rigged into improvised grenade weapons.

Weapons using this ammunitionEdit

Icon cut contentThe following is based on developer test content cut from Fallout: New Vegas and has not been confirmed by canon sources.
Icon cut contentEnd of information based on developer test content cut from Fallout: New Vegas.



Main article: Workbench

After firing, there is a chance that spent microfusion cells will turn into drained microfusion cells. These are automatically placed in the player character's inventory. Drained microfusion cells can then be recycled back into usable ammunition at a workbench.

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Microfusion cell (1)
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Microfusion cell (1)


Conversion (type)Edit

Microfusion cells can be converted into, and from, other energy weapon ammunition types (i.e. electron charge packs and energy cells) at a workbench, with the appropriate Science skill.

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Microfusion cell (1)
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Microfusion cell (1)
Conversion (variant)Edit

The player can also pool charges from good cells together to make more powerful variants, which improve damage and bypass more of an enemy's DT, but burn out weapon components faster.

Microfusion cell (3)
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Microfusion cell over charge (2)
Microfusion cell (5)
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Microfusion cell max charge (2)
Microfusion cell (3)
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Science: 55/(70)¹
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Microfusion cell optimized (GRA) (2)

¹ Due to Vigilant Recycler having Science 70 as a pre-requisite, none of the Optimized recipes can be made at the skill listed in the workbench.


Microfusion cell, bulkEdit

Bulk microfusion cells carry less charge than standard microfusion cells, but are substantially cheaper to compensate. The reduced charge results in 85% damage and no Damage Threshold negation (standard cells negate 2 points), but also reduces the strain on the weapon to 85% as well. The bulk design also means a significantly reduced chance of recovering the drained cell (only 20% compared to the standard 35%).

Microfusion cell, over chargeEdit

Over charged microfusion cells gives a damage multiplier of (x1.25 or 125%) and negates 5 points of an opponent's Damage Threshold. This comes at the cost of having the weapon deteriorate at a faster rate (x1.50 or 150%) as well as only a 25% chance of recovering the drained cell.

Microfusion cell, max chargeEdit

The max charged version of the microfusion cell deals the highest possible damage (x1.5 or 150%) at the expense of highly increased weapon degradation (x2.50 or 250%) and only a 10% chance of recovering the drained cell. Using this ammunition type also negates 10 points of an opponent's Damage Threshold.

Microfusion cell, optimizedEdit

Added in the add-on Gun Runners' Arsenal, this version provides an optimal balance of power and efficiency, superior in all properties compared to overcharged cells. Damage is multiplied by (x1.3 or 130%) and Damage Threshold penetration is equal to the overcharged cell at 5 points. It weighs less than the standard microfusion cell yet has the same 35% chance of recovering the drained cell. The only drawback is a minor increase in weapon degradation (x1.1 or 110%). It requires Vigilant Recycler and can only be crafted at a workbench.


Ammunition typeAssault carbine extended magazines Damage modifierIcon damage Damage Threshold modifierIcon shield gold Condition penaltyIcon repair Spread modifierIcon spread Bonus effectIcon effect CraftableIcon crafting Percentage chance of empty casingIcon chance
Microfusion cell, standardx 1- 2x 1x 1yesIcon check35% chance
Microfusion cell, bulkx 0.85x 1x 0.85x 1noIcon cross20% chance
Microfusion cell, over chargex 1.25- 5x 1.5x 1yesIcon check25% chance
Microfusion cell, optimized fnvgraGametitle-FNV GRAx 1.3- 5x 1.1x 160% of standard weightyesIcon check35% chance
Microfusion cell, max chargex 1.5- 10x 2.5x 1yesIcon check10% chance


  • A large stockpile of microfusion cells can be found at REPCONN headquarters, behind a locked door (Lockpick 50) on the first floor. Over 600 microfusion cells can be found throughout the building.
  • Quartermaster Bardon in the Hoover Dam offices stocks large quantities.
  • The Great Khan armorer, southeast of Red Rock Canyon stocks large quantities.
  • Hidden Valley bunker. If the Courier gains accepted status or higher with the Brotherhood of Steel, they will be approached by a BoS initiate telling them that they have placed recycled ammunition in a box at the bottom of the entrance stairs into the L1 area. The box will be replenished randomly with microfusion cells, electron charge packs and small energy cells whenever the Courier enters L1, providing a continuous supply of energy weapons ammunition.
  • The Silver Rush sells very large quantities, and also has a lot of the ammo "on display", that can be stolen.
  • Having an NCR emergency radio, and an Energy Weapons skill higher than the Guns skill, will allow for the calling for a supply crate which usually contains an amount of microfusion cells.
  • In Vault 22, over 100 microfusion cells can be found in the reactor room, inside two lockers in the common areas.
  • Magnetohydraulics complex - 260 at the bottom of the underwater section. Old World Blues (add-on)Gametitle-FNV OWB
  • Campanas del Sol - 80 in an open tool cabinet, small ruined room with crates and shelves, on the 2nd second floor, west side. Dead MoneyGametitle-FNV DM
  • Cliff Briscoe in the Dino Bite gift shop sometimes stocks large quantities.


  • Microfusion cells are used by 12 different weapons, the largest number for any ammunition type in Fallout: New Vegas.
  • The in-game mechanics of the microfusion cells are somewhat inconsistent. The Holorifle uses a single and whole microfusion cell with each shot like normal ammunition, while the Laser rifle is visibly loaded with one microfusion cell which lasts for 24 shots, but expels a cell from the inventory with every shot fired. The Gauss rifle and Pulse gun are visibly loaded with one microfusion cell but expend multiple cells from the inventory with each shot.
    • Furthermore, all of the microfusion cell-powered weapons have a chance of dropping a drained cell with every shot, no matter if it the single loaded cell lasts for multiple shots like the laser rifle, or if multiple cells are expended per shot like the gauss rifle (such weapons also only drop a single drained cell per shot).
  • In Hardcore mode, they are very heavy when carried in bulk, as 10 of them weigh 1 pound.
  • Rigged shotguns use a microfusion cell as a power source.
  • According to writing on the side, the cell is apparently capable of outputting 1040.8 DC volts. This is incorrectly labeled as "Capacity." The capacity of a power source (that is, the amount of electrical energy it can contain) is properly measured in watt-hours, not volts.

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