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
![Solar Powered Smartphone Concept Silver Smartphone Stock Vector (Royalty Free) 204828451 | Shutterstock Solar Powered Smartphone Concept Silver Smartphone Stock Vector (Royalty Free) 204828451 | Shutterstock](https://www.shutterstock.com/shutterstock/photos/204828451/display_1500/stock-vector-solar-powered-smartphone-concept-silver-smartphone-with-solar-panel-apps-taking-up-all-of-the-home-204828451.jpg)
Solar Powered Smartphone Concept Silver Smartphone Stock Vector (Royalty Free) 204828451 | Shutterstock
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20000mAh Solar Charger for Cell Phone iphone, Portable Solar Power Bank with Dual 5V USB Ports, 2 Led Light Flashlight, Compass Battery Pack for Outdoor Camping Hiking(Green) - Walmart.com
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