Even if the world remains peachy-keen for the rest of your days, this solar-powered phone charger will come in handy. If you spend a lot of time outdoors, you’ll love the carabiner strap ...

Read more: Battery Brands Ranked From Worst To Best To understand how a solar panel phone charger works, you really just need ...

This half-inch square ultra-low power energy harvesting LiPo cell charger by [Kris Winer] uses a low voltage solar panel to top up a small lithium-polymer cell, which together can be used as the ...

A research team achieves 63% energy storage efficiency and 5.17% overall efficiency by combining a supercapacitor with a solar cell.