NEW YORK, Jul. 29, 2015 /PRNewswire-iReach/ -- Prong is the consumer-electronics developer that introduced the PWR Case, an iPhone 6s charging case with a detachable battery pack. According to Prong co-founder Lloyd Gladstone, the release of "Tangerine," a full-length feature film shot entirely on an iPhone, has amateur videographers excited about their smartphone's moviemaking potential. However, shooting a video with your iPhone can be a shaky challenge.read more