E-RAN iPhone 6 Battery Charger Case 5800mAh External Battery Case Power Bank For iPhone 6S Portable Universal Slim Rechargeable Backup Case (Rose Gold) The backup battery case build-in Lithium ion polymer batery,which is high power, miniaturization and lightweight, easy to carry and protective case; The powerful 5800mAh can provide more than a full charge for iphone 6 6s ,its cycle life more than 500 times, about 4 hours will be charge full; Its looks fasion in curving design and durable from the front, looks ultra-slim from other side view, with good touch feeling; Provides a non-slip backing so it is easy to grip and hold on, intelligent IC can effectively avoid short circuit; Black&White&Gold&Rose gold on sales now, add a bit of fun to your mobile phone.