iPad Mini 2 Retina Display in Prototype Phase -The second-generation iPad or iPad Mini Mini 2 claimed to have been in the prototype stage. Mini rumored that the iPad 2 is still in the development stage because Apple is still having problems with battery Mini iPad 2.
Most likely the problem is the battery is the problem of battery life. Because as we know, the use of Retina Display in iPad Mini 2 is enough to drain the battery, while the small body can only hold the iPad Mini battery with dimensions that are not so great.
Citigroup itself predicts that the iPad 2 is the new Mini will be released after the iPhone version of the iPhone 5S and cheap sliding, aka around September to October. iPad Mini 2 with Retina Display Already in prototype stage.