The Yard Force 21W Solar Panel LX PB21 transforms the way you power up your devices while on the go, highly efficient solar cells convert up to 24% of solar energy into electricity. The 21W battery with digital indicator gauge provides upto 14 hours of continuous power, delivering charge to your devices multiple times over. The dual USB ports and the triple charging cable can be used to charge most mobile devices such as mobile phones, laptops, iPads, camera...