Portable USB battery pack bike light (with a Luxeon III conversion)

You’ve probably seen how handy it can be to have a portable USB power supply for charging iPods, PSP, cellphones etc. I decided to make one but it needed to be multipurpose to justify carrying around the extra weight.

I wanted to make it as simple a possible so I decided to use 4 AA sized NiMH batteries rated at 1.2v (or 1.25v) Which can provide the needed 5v without regulation. This also makes it possible to more quickly charge PSP’s which can draw almost 1A when charging.

To extend the functionality I decided it should also be a flashlight. But a quick search of the local stores showed that most AA flashlights are generally 1 or 3 cells. Fortunately for me I decid…

By: warlord

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