1).1900 Ma lithium ion battery 2).Standby time >380hs 3).Travel battery for iphone 4/4s 4).Portable rechargeable batteries

---Output Voltage: DC 5V

---Output Current: ≤700mA(0.7A)

---Input Voltage: 5V

---Input Current: ≤1000mA(1A)

---Battery capacity: 1900mAh

---Charging time: 4 to 6hs

---Working temperature: -10°C to 40°C

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

---Standby time: >380hs

---Call time: over 6.5hs at 3G/over 12hs at 2G

---Surfing time: over 6.5hs at 3G/over 7hs at Wi-Fi

---Music playing: over 28hs

---Video playing: Over 8hs

---Size: 125 x 66 x 15mm

---Weight: 66.5g

iPhone 4/4S

---Petite,convenient,easy to use,high capacity

---USB cable charge,4 LED power indicators 

---Color: Blue Green White Black Purple

Photos:

External Battery Packs for Iphone 4/4s