article_snippet: A wind-up iPhone case that can charge a phone simply by spinning a handle on the back could spell the end of 'battery anxiety'.
article_snippet: The handle on the back of the case can also be used as a support to prop up the phone for watching videos.
article_snippet: Mr Gabriel said that spinning the handle on the back of the case for one minute can provide enough battery life for 40 minutes of standby use for an iPhone, and 20 minutes for an iPad mini.
article_snippet: The handle of the case can be folded away when The handle of the case is not in use so that The handle of the case can be slipped easily into a pocket .