The solar panel does not hold a charge it produces power when it is exposed to sunlight. You can plug your phone directly into the panel or use it to recharge a portable recharger for later use. 

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• Portable 20-watt solar panel for weekend camping trips
• Foldable panel is sleek enough to fit in almost any pack
• Durable design holds up on dusty hikes and campgrounds
• USB and solar outputs give you options on what to charge
• Pair with Goal Zero battery packs to use the power later
• Can be chained to other Goal Zero panels for faster charging
• Integrated cable storage and adjustable kickstand make charging a breeze

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