Specification:

• Compatible for Apple's iPad 2 16GB, 32GB, 64GB.
• Capacity: 6,600mAh.
• Output voltage: 5.0, 2V.
• Output current: 2,100mA (maximum).
• Input voltage: 5.0V.
• Input current: 1,200mA (maximum).
• Product dimension: 248 x 225 x 30mm.
• Weight: 550g.
• Protect functions: short-circuit and over-current, charging and discharging.

Extended power time: 

• Cycle lifespan: over 600 times.
• Video playback: up to 8 additional hours.
• Audio playback: up to 55 additional hours.
• Standby time: up to 550 hours.
• Working temperature: -10 to 45°.
• Storage and shipping temperature: -10 to 45°.
• iPad is a trademark of Apple Inc.