If your iPhone is dead, you should get to around 30% battery in about 30 minutes of wireless charging. This doesn't mean you can use any Qi wireless charger (the industry standard) for fast charging.

Information on Apple's website reveals that charging your phone overnight will not destroy your iPhone's battery ...

You don't have to wait around for your iPhone to juice up. If you've ever found yourself sprinting out the door with only 5% battery, you're not alone. Fortunately, there are a few quick and easy ...