Should I charge my iPhone 5?

First time use and battery is gone die, should I let it die or charge it? Some say its better to let it drain all out is that true?

Can't support what I answer, but i remember reading on a mac forum, that its best not to let drain all the way down, or it could kill the battery and prevent it from taking a charge. For whatever its worth.

Yes, charge it. I think that's a bit of a myth.