Imagine you are explaining the human toll of making rechargeable batteries to your friends. what would you tell them

The acid inside the battery has this electric powder, when it runs out, the acid is no longer useful, the electricity recharges the acid and does it over again. You can tell if the battery is full if you drop it 2 inches the from the floor and it stands, if it falls, then its empty as in no more juice in the battery.