A small copper cylinder with two black plastic caps on each end.
- Fallout 4
- Fallout 76
- Three may be found on a shelf in the ruined hardware store across from the Museum of Freedom in Concord.
- May possibly be dropped by feral ghouls.
- Found on many pre-War commercial robots.
- RobCo sales & service center. Four can be found on shelves in the
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