... , the LED indicator is Red. It turns to Green color when full charged. 2, How to know the power bank's electric quantity ... -2, Green LED indicator shows capacity: 25%-75%-100% 3, How to charge cell phone, iPhone, iPad1, iPad2 or MP3, MP4, PSP ... do charge the power bank over 9 hours to extend it's lifetime. 2, make sure the power bank's voltage is ...