Everyone in this world is measured by their battery percentage. Not on their phone but openly displayed on their heads. 100% means fully charged with energy and can go on for hours. 50% means you're sorta not feeling it and sorta am feeling it. You're in the middle basically, you're neutral. 20% low energy that can go on for a few more hours like three max. 10% means you're extremely low and might have to re charge soon. 1% means you're at a critical point that if you don't charge you might die. 0% means you're dead, no one can bring you back by charging you that's the equivalent to being dead normally. People have special charging stables for charging. Other any that life is pretty much modern and normal except with the people's energy level replaced by a battery percentage instead.