Portable Charger for your Smartphone

For a long time I've had old back up cell phones taking up space in my desk drawer. I was curious if I could put any of these old phones to some use. I can't just throw them away so I decided to try and re-purpose one of them as a portable charger for my current smart phone. Step 1: Materials Mp1405 5v 1a Lithium Battery Charging Board (Blue board) http://www.amazon.com/gp/product/B00EXGFG42/ref=oh_aui_deta ...

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