charge your device anywhere 1.apply for: tablet iPhone,iPad,mobile phone 2.certification:CE ROHS FCC ... for 2 seconds,led torch open;press long again, torch close full electric state,it can last more than 540H.2.Battery ... :mobile power has one power light and four battery gauges,about the electricity situation as follow,(one ... phenomenon,pls stop using. 4400mAh mobile power supply for iphone,sony etc.