... is a device that transforms light energy into electric energy with the application of solar energy battery pack ... hours light charging one day, it can supply TV of 100W, electric fan of 50W, a laptop of 80W, ... 10 hours light charging one day, it can supply the electric fan of 50W, a laptop of 80W, two ... of 8 hours light charging one day, it can supply electric fan of 50W, two energy saving lamp of ...