... indicator is Red. It turns to Green color when full charged. 2, How to know the power bank's electric ... quantity? 2-1, press down switch button to check the ... indicator shows capacity: 25%-75%-100% 3, How to charge cell phone, iPhone, iPad1, iPad2 or MP3, MP4, PSP etc ... Samsung P1000 (need custom-made), Apple iPad1, iPad2, iPhone cell, MP3, MP4, PSP, GPS etc.3-5, ...