Lighting/Cell Phone/Laptop Charging
Solar laptop chargers typically have a wattage of about 5 to 21 watts on average.
The larger the solar panels are, the higher the wattage. You also have to consider the charger’s surface area, because it’s a good indication of its charging capacity, performance and how efficient it will be at charging your laptop. The more output power your charger has, the more devices you’ll be able to use it for. To find out what the output power is in your charger, simply test them one by one.