1).1200 mAh Power Back Backup External Bachup Battery for 4S/4G and for iPod 2).Unique ELD display and exquisite design.

Features:• Compatible with all generations of iPhon and iPod (excluding for iPod shuffle).• Built-in Electroluminescent Display (ELD) indicates accurate battery status and glows green ascending light when charging.• Easily recharged via USB connection.• Steady high-current output ensures charging efficiency and safety.• Integrated smart chip provides full protection against electric overload.• Unique ELD display and exquisite design is a great match with the aesthetic of the iPhone/iPod.• Battery is charged via USB cable• After fully charged, the battery can be used as a backup independently

Specifications:

---Output Voltage: DC 5V  Input Voltage: 5V

---Battery type: Lithium-ion Polymer

---Battery capacity: 1200mah

---Input/output: 500ma/800ma

---Charging cycle: more than 500times

---Charging time: Approx. 2 hours

---Charge your iPhone by this product: 2~3hours

---Working temperature: -10°C to 40°C

---Storage temperature: -20°C to +50°C 

--- Product size: 72*46*16 mm 

---Color: Black,    Weight:45g

---Compatible with iPhone 3G, iPhone 3GS,iPhone 4 /4S and most iPod (Excluding iPod Shuffle)

---Featuring EL film technology power status display

---Built-in Electroluminescent Display (ELD) indicates accurate battery status and glows green ascending light when charging

---Talk Time: Up to 3 hours on 3G / Up to 7 hours on 2G

---Audio Playback: Up to 18 hours

---Internet Use: Up to 5.5 hours on WiFi

Specifications:

Packing:

External Backup Battery for iPhone 4S/4G/iPod