How long does it take to charge an iPhone from 0% to 100%?

How long does it usually take to charge an iPhone 5s from 0% to 100%? If you don't have an exact time, a rough estimation in the ballpark is fine. Any help is appreciated. I'm trying to determine if my iPhone 5s is one of the few ones with the "manufacturing defect" that causes the battery to take longer to charge and quicker to drain. Thanks in advance.