The Cyber Power CPBC4400 Mobile Battery Pack charges and powers your mobile USB devices including smartphones, MP3 players, and handheld gaming systems while you're away from other power sources. The rechargeable compact lithium-ion battery provides up to 690 hours of runtime and offers convenient portability. A built-in 1-Amp USB port works with any USB cable to charge and power 1A USB devices. The attached USB connector can recharge the battery when used with any powered USB port external to the battery. (Typical battery recharge time is six hours.) The CPBC4400 Mobile Battery Pack includes the lithium-ion battery, USB cable, USB charging connector, LED flashlight, user guide, and a one-year limited warranty.