This past weekend my Boost case came in for my 4S. I was surprised to find out that it was almost fully charged. Like it a lot. But how do you manage charging it? Do you leave the phone in the case when charging? If yes, how do you set the button on the back? How do you know when it's set right? Sometimes when I leave the phone in the case and plug the case in, the phone charges but the case only flashes one LED and doesn't charge up, but the phone does. Not sure how to get the case to charge after the phone is 100%. Any other tips/advice on using the Boost case would be appreciated.