Smartphones today have can have pretty disappointing battery life, but if you have a small hand-powered charger in your pocket (or glove box, or purse, or whatever), you'll never have to live with a dead phone again. DIYer Ben Heck shows us how to slightly modify an hand-powered LED flashlight to include a USB port for phone charging. Check out the video above to see how it's done.
DIY Hand-Powered USB Crank Charger
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