EZOPower USB Dual Cradle Desktop Charger + 2600mAh NFC Standard Battery for Samsung Galaxy S IV / S4 GT-I9500 (AT&T, Verizon, T-Mobile, Sprint) EZOPower 3in Feature: USB Sync and Charge Cradle Desktop Charger with 2nd Battery Charging Slot First slot: Sync and charge phone. Second slot: Charge 2nd battery. The USB docking cradle holds your Galaxy Cell Phone at a comfortable reading angle and provides convenient access on your desk EZOPower NFC Standard Lithium-Ion Battery (2600mAh), **NFC - Near Field Communication Enable For Google Wallet and S Beam Function Compatible with Samsung Galaxy S IV / S4 GT-I9500 (AT&T, Verizon, T-Mobile, Sprint, Cricket, US Cellular)