This Instructable shows you how to build a lighter-based 12v battery trickle charger made from a laptop power supply, a LM317T regulator, and an Altoids tin (and some other misc components).
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I have seen from the post an amazing invention. From the power source of a laptop we have now a charger. From whatever little I have seen it is making me more and more thrilled. I always liked to invent things and you are providing an opportunity to learn.
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