... &ROHS4.Solar Laptop Charger Power: 4.0W Features: 1.Lithium ion polymer Battery capacity:3.7V 54000 mAh (200wh)2.Output voltage ... / Notebook and other electronic products.3.Exclusive market up to 3V, 5V, 6V, 9V, 12V, 16, 19, 22 V, 24V output ... .Intelligent key: Power on/off button and Voltage choice button2.Battery status button3.Low and high voltage button on the left can choose ...