Why don't smartphones have a built-in solar charger? There is plenty of surface area on the back of the phone and even the screen itself could be used. - Quora
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Mini 6V 210MA 1.25W Mono Solar Panel with solar charger CN3065 Cell Phone Charging DIY Kit with 1S Battery holder /display - IoT CI Limited
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Longzhuo Polycrystalline Silicon Solar Panel 2W 5V Outdoor Solar Battery Charger Mobile Power Supply for Charging Mobile Phone : Amazon.co.uk: Electronics & Photo
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Lixada 10W Solar Panel Charger 5V USB Ports for Cell Phone High Effiency Outdoor Activities Lighting Use Portable Ultra Thin Monocrystalline Silicon: Amazon.co.uk: Electronics & Photo
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Funien Solar Charger, 2.5W/5V Solar Charger With USB Port Monocrystalline silicon Compact Solar Panel Phone Cellphone Power Bank Charger For Camping Hiking Travel : Amazon.co.uk: Electronics & Photo
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A ADDTOP Solar Charger Power Bank - 25000mAh Fast Charging Portable Charger with 4 Solar Panels Solar Cell Phone Charger External Battery Pack for Phone Tablet: Amazon.co.uk: Electronics & Photo
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