Dyconn SGS4CW X4 Samsung S4/SIV Protective Case with 3000 mAh Battery Extender - White Rechargeable 3000 mAh Lithium Polymer Battery Protective Case Battery acts as extended power source not for total of 5600 mAh operationally. Slim/Compact Design Optional Qi charging accessory available Rechargeable 3000 mAh Lithium Polymer Battery^Protective Case^Battery acts as extended power source not for total of 5600 mAh operationally.^Slim/Compact Design^Optional Qi charging accessory available