Into the Pip-Boy, Marcus replies, "I am up on the Observation Deck. I haven't been able to locate any explosives here. Either I may just be missing it, or they may not have it made it up here. I am going to make one more sweep before I move on to the others. If you're coming up, I could use your help." After thinking for a moment, he asks "When we get a moment to study these, can you figure out the battery life on these Stealth Boys, Alice?"