A small device that lets me piggyback off my friend's phone's battery if my battery is at 5% and theirs is at 99% and they can spare some charge cycles.
I've thought about how public chargers are something that businesses should start using. Imagine sitting down at a restaurant and getting a full charge during your meal.
If wireless charging gets more standard, then there won't be an eyesore of cables.
My university added some charging stations in public places in my senior year. There were countless times where these came in handy for both myself and fellow classmates, I can definitely see this catching on