Are you a heavy smartphone user that requires more than 1 battery? The Samsung Galaxy S4 Spare Battery Charging System is exactly what you need. This package includes a battery charger, travel charger and standard battery. This will give you the peace of mind, knowing that you always have a back-up battery when you need it. The battery charger also serves as a protective case for your battery. Package Contents: Spare battery charger, 2600mAh standard battery and 700mAh micro sub travel charger. OEM Part Numbers: EB-K600BUWESTA/EBK600BUWESTA. Compatible with the Samsung Galaxy S4 Active i537, Galaxy S4 S 4 i337 AT&T, Samsung Galaxy S4 S 4 L720 Sprint, Samsung Galaxy S4 S 4 M919 T-Mobile, Samsung Galaxy S4 S 4 R970 US Cellular and Samsung Galaxy S4 S 4 i545 Verizon Wireless phone models. Cables & Etc. is the owner of the trademark C&E. This UPC is trademarked under C&E. Any violation will be reported to Amazon without any prior warning.