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This is old, 20 watt panel. Solar panel output drops with age (50% is common) and 20w is not a lot to start with! Most laptops need 18v -20volts at 2amps to 4amps, so no possibility of powering ANY laptop with this item. You might be able to power a tiny computer like a Raspberry Pi or charge a really old cellphone. My samsung s80 comes with a 35W mains charger. Most modern phones use special fast charging circuits that draw 2-3 amps, so they won't work too.
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