YESOO&trade; SMART VIEW Protective Case Cover With 5200mAh NFC Support Extended Battery And BLACK Back Cover For Samsung Galaxy S4 SIV i9500 (S-View: Purple) Smart View Cover Design For Extended Battery and Cover Precise Cutouts Give Full Access To All Ports. Capacity: 5200mAh (Class 10 - High Quality / NFC) This Battery Is Equipped With An NFC Antenna Cases are double designed to provide optimum performance with their ultra thin TPU matte finish, Prevents Fingerprints, and smudging Compatible: ONLY WITH YESOO GALAXY S4 EXTENDED BATTERY COVER!