You're driving down the road, the cool summer breeze helping attenuate the heat of the sun, great music playing from the speakers, and nothing but empty highways ahead. Suddenly, you look at your phone and realize that the battery is almost dead but you need it to be alive to use Google Maps when you reach the next town. Your partner's phone is plugged into the car charger and they specifically told you to let it fill up before they dozed off half an hour ago.

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