... design 24W 18V Multi-function Portable Solar Charger for Laptop, Mobile Phone, MP3, MP4 Key Specifications/Special Features: Power 24WOperating voltage18VOperating ... lampsSTCirradiance 1000W/m², AM in 1.5Module temperature25°CCharge objectlaptop, MP3, MP4, mobile phone, interphone, communication equipment, small power ... 24W 18V Multi-function Portable Solar Charger for Laptop, Mobile Phone, MP3, MP4