Here is a battery organizer that I made recently. I found the plan on the wood magazine site. I have a list of free project plans over at my blog. It was a free plan and pretty fun to make. The whole project only took a few hours, and can be made mostly with just scraps.
You can check out my full entry on how I made this over at: www.woodlogger.com
I also attempted to make a video of how I made this: