Like it or not, there will eventually come a time when you will have to plug in that smartphone to a power outlet. And when that time comes, the name of the game isn't just battery size, it is charging time. Advancements in technology today has brought as the likes of Qualcomm's Quick Charge and similar features. But which smartphones really have the fastest and most efficient charging time all in all? As you might have already guessed from the title, it is probably not something you expected.