A:AnswerI believe you cannot. Apple has a totally different charging port. You can use Samsung chargers, or even the charger for your PS4 controller. I use the charger from my controller and it works perfectly. But these headsets also come with a charger, so you wouldn't have to worry about that.
A:AnswerYes you can on both, i play cod: black ops 3 right now. I do not really use the perk to amplify enemy sound and i can hear them pretty good.
The gun fire and jet pack thrusters, you can hear and tell what direction they are coming from