... for mobile phone, MP3/MP4, PSP, NDS, iPod, iPhone,ipad Specification: 1. Universal USB Charger can be use to ... remain power.Press the button, LED lights will turn on to indicate the remain power.How to charge digital ... lights turn on, the charger begins to charge.4. After charging, keep pressing the button for 3 seconds to turn off the ... rechargeable external power pack for mobile phone for Iphone 4/4S