The first shipment of Mugen Power’s 4000mAh Battery Case for Sony Xperia Z Ultra [CC-6802] will start on Monday, having already sold out. There certainly seems to be demand for this 4000mAh battery case, with the second shipment also nearing a sell-out. If you want to get a quick look at the Mugen Power battery case, then check out the video below, which shows how the phone attaches to the case. The Sony Xperia Z Ultra 4000mAh Battery Case costs $98.50 plus shipping on top (free express delivery applies to orders over $150).
