Power bank,capacity:4100mAh,A portable chargers could charge all iphones and Ipad,other mobile phones,LiCo2 materials.

Power bank for Iphone 4s/ipad

Colors: white and black Lifespan: over 500 times Capacity: 4,100mAh Input voltage: 5V, 800mA Output voltage: 5V, 1,000mA Operating temperature: -10 to +40°C Storing temperature: -20 to +50°C Charging time: 3 to 4 hours

External cell phone battery 3.7V 4Ah