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Fallout 3 Game Add-Ons (DLC) Hints
Bring Marguerite six Fission Batteries.
1 of 5: Blackhall Manor (location 13 on the World Map) is a convenient place to get these, especially if you got your punga fruit from the nearby Grower's Shack.
2 of 5: Enter the manor through its front door, then go upstairs.
3 of 5: Search all of the container items you can find, including tool boxes, cabinets, garbage cans, etc.
4 of 5: You should find enough fission batteries there, but you can also check the shelves outside Haley's Hardware (location 9), Haley's merchant inventory (if you're willing to pay for them), the back of the truck at the Truck Wreckage site (location 23), the wreckage at the Jet Crash Site (location 19), the ground floor of the lighthouse (location 5), and the Belowdecks area of the USS Ozymandias (location 29).
5 of 5: Once you have enough batteries, return to Marguerite and talk to her about the tonic to hand it over.
