Ignorance can be fixed, stupidity is forever. So, let's assume you are just ignorant, shall we?
The airpods are stored in a case, the case charges the airpods. Now, just 15 minutes in the case charges the airpods for 3 hours. The case has a built-in battery that can charge the earpods for 24 hours on a charge. The case is charged via a micro-USB. So, you won't go down the road 2 miles, unless you are crawling and dragging yourself along the ground.
If you are crawling, and dragging yourself along the ground - say you were shot, had a car accident or something along that line - all you have to do is talk. You see, the earpods have accelerometes built into them, and can detect when you are moving your mouth. When you move your mouth and talk - they listen. So, you say something like "Siri, call 911". No buttons to push, just talk.
Now, say you are worried about losing them, after all, they are $159 a pair. When one falls out - there are IR detectors in each of them - they stop playing music. So, if you are distracted, and one falls out - the music will immediately stop.
Full data is explained, in very simple terms right here: http://www.apple.com/airpods/
You like being the smartest guy in the room? Ha ha.
You must be an engineer...you read directions.