Biggest piece of garbage, ever.  Bought two of these - one for my phone and one for my sons.  Neither one worked.  Followed the "simple" instructions - plugged phone into case, then plugged charging cord into case.  However, while the case was supposedly charging, the phone was not.  In fact, it appeared that the case was draining power from the phone!  DO NOT WASTE YOUR MONEY ON THIS PRODUCT.  I will be returning both cases.