monocrystal silicon solar mobile phone charger 1.Acrylic Shell 2,5000mAh Grinding Screen 3,To All SmartPhone & Ipad monocrystal silicon ... :281G,GW:703GTechnical Parameter1.Solar panel:5.5 V,3W 2.Solar conversion efficiency above 17%3.Built-in battery(Li ... voltage charge,equalization charge to lengthen the lifespan of battery.2,Temperature compensation ,heat-regulation and TSD functions.3,PWM control ...