Portable USB power

This project details a small & simple, but very powerful USB charger for your



mp3
player


, camera, cell phone, and any other gadget you can plug into a USB port to charge! The charger circuitry and 2 AA batteries fit into an Altoids gum tin, and will run your iPod for hours: 2.5x more than you’d get from a 9V USB charger! You can use rechargable batteries too. [
via
 


Minty Boost: Portable USB power

   
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