Hi, Lately I got my i phone and togeter i got an external power pack that allowed me to plug it in to charge when yr iphone is running low in battery. As I understand this brand does have some others like power miracle as what you mentioned. I got this product or brand when I got my iphone last week i n Johor Bahru Landmark Mall. The brand of the name or the website is

http://www.iphonemili.co.uk/collections/detail_miracle.html

hope i can answer your question!