I'm going to be using an arduino as a computer of sorts on my bike. It'll be powering lights and a 16x2 lcd. I know this isn't a big power draw, but the reason I want to use a laptop battery is so that I can charge it once and not have to worry about it for months. Here's the thing, I don't want to…

Powering an Arduino with a laptop battery.

CrossRoads September 6, 2012, 6:15pm 3

Module like this wouod work well also

Set the output to 7.5V and connect to the barrel jack.

I would have recommended 5V and connecting to 5V header, apparently Arduino's now have blown regulator issues doing that.

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