Poseidon Energy employee ID card

 is a miscellaneous item in Fallout: New Vegas.

Characteristics
Similar in appearance to holotapes, two of them are found during the quest That Lucky Old Sun.

Locations
HELIOS One in the solar collection tower: past the Mister Gutsy, down the multi-leveled stairwell, turn right (away from the protectron), left into the room, follow the room right, i.d. is next to a skeleton on the ground near desks.

Uses
Used to activate a repair robot in the solar collection tower to complete the That Lucky Old Sun quest if your repair skill is not high enough to repair the generator yourself.