Idly reading about the #Challenger #SpaceShuttle explosion
....and I think I found a time traveler.
The previous several launch attempts were scrubbed for various reasons. The day before the launch:
"Monday was the next opportunity, but a screw failed to release from the crew hatch of the orbiter. A drill was ordered to be driven to the pad, but the battery was flat. ***Nine more batteries were sent to the pad, but all, for no apparent reason, became flat by the time they arrived at the launch pad.**" Time ran out and the launch attempt was scrubbed." [emphasis mine]
https://www.nasaspaceflight.com/2007/01/remembering-the-mistakes-of-challenger/
How does that happen? And how does someone, after changing a battery **4 times**, decide they need 5 more tried *using the same drill*?