Solar panel output: 18V, 320mA Working temperature: -20-80°C Working life of solar panel: Above 10 years Dimension: 390*280*5mm,Weight: 390g Full 12 months warranty Product DescriptionWould two batteries provide sufficient power supply for the laptop in a long journey, especially in the open air? Definitely not. However, it will cause inconvenience if carrying more. It is [...]