Cutoff to prevent overcharging Where is the cutoff for overcharge protection in the iPhone 6? Is it in the charger or in the actual unit? I purchased a wireless charger adapter and pad for my phone and want to know if it is safe to leave overnight. once the electricity reaches the adapter it has no where to go.. if it were connected it would go back into the wire right? So is this wireless charging safe?
Your terminology is slightly off. The "charger" is actually a chip INSIDE the phone that manages everything about the way your phone is charged, including overcharge protection, thermal protections, and much more. The power adapters are just that: power adapters. They're used for providing DC power to the charger within the phone.

I'm honestly not sure how any kind of 3rd party wireless charging solution works.