iRulu 5V / 10000mAh Travelling External Battery Pack and mobile power bank for mobile phone Nokia, Motorola, HTC, Samsung, Mp3, Mp4, Tablet Ultra High Capacity 10000mAh ,extend 50 hours of talk time or 25 hours of video play back time for iPhone 4. If you have the original adapter, you can charger for your iPhone 4s 4 3Gs 3G, iPod Touch, iPad 2, Samsung Galaxy S3 . The lithium-ion polymer, long service life, more safety.Compact, portable and stylish Design. Convenient to carry in your pocket or purse. Leave it plugged in to your phone Long service life, more than 500 times the charging and discharging The power supply output plug in USB port, data can be realized at any time with charging mobile phones whenever electric power demand, away from the power problems.