What Were You Wearing is a terrible name for a survivor advocacy group. Why would you pick a name that is a big trigger for a lot of people?
Usually they're used in thin devices where a bigger battery wouldn't fit. Lots of computer styluses take AAAA batteries, including the Microsoft Surface Pen. There are also some small flashlights and laser pointers that use them.
That's really cool! How did you do the detection of who started it and what floor they're on?