Energy Cell (Fallout 3)

The energy cell is a type of ammunition $$

Gameplay
Energy cells are most commonly found on destroyed robots, but merchants also sell them in large amounts. They are sold for at least 2 caps each.

Weapons using this ammunition

 * Laser pistol
 * Colonel Autumn's laser pistol
 * Plasma pistol
 * Protectron's Gaze
 * Smuggler's End
 * MPLX Novasurge

Locations

 * Nine ammunition boxes in the National Archives Secure Wing East, most of them next to the safe with the Magna Carta.
 * Five boxes in Fort Bannister Commanding Officer's quarters, in an Average locked storage room near the CW entrance.
 * Three boxes at the Hilltop outpost.
 * Three boxes in bookcases in the center of the RobCo factory floor.