Features:World's highest capacity for Galaxy S4 @ 7500mAh- More than 3 times the capacity of original Galaxy SIII Battery and 1 time more than other makers' Galaxy S4 Extended BatteriesZeroLemon in house engineered Full Edge Wrap TPU case- World's only maufacturer to integrate both back cover and case into one for ultimate drop protection. NFC Built into the battery-All functions on Galaxy S4 such as S Beam and Google Wallet are activated-------------------------------------------We engineered the world's highest capacity battery for Galaxy S4 while providing a full edge wrap case to protect your valuable phone. We acheived these features while maintaining the same phone thickness as other makers' lower capacity batteries. This 7500mAh battery doubles the capacity of iPad Mini Tablet! (iPad Mini rated at 4490mAh) -------------------------------------------*Must use included Soft Plastic TPU case with this batteryDue to oversize capacity, phone will show battery at 3% for slightly prolonged period, this is normal behavior*Actual battery life will vary depending on your hardware and software configurations and network conditions.*To charge the extended capacity & battery charge for 2-3 hours after 100% charge.