Battery 6s first charging
Hey! I am very confused on all the responses I found on the Internet. ..I just bought a new 6s and I don't know exactly which is the correct way to charge it for the first time. I used it until the battery died (that's what they told me at the store to do) and now it's charging while it's turned off. I don't know if I have to leave it extra time on charge or not. And after the first charging, how i should charge it properly? Please help! Thank you!
iPhone 6s, iOS 9