I'm not a woodturner, so I may not be totally up to date on the latest turning projects. But this one made me smile.
While it's not for sale as a project or a kit (that I know of), I thought it was an interesting use of turned wood.
I have no clue how difficult it would be to hollow out the inside to accommodate the batteries, and you'd have to make a tight fitting (screw-on) cap to keep the batteries inside. But those are the kind of challenges woodworkers usually enjoy.
If you like the idea and don't have a lathe, you can visit the Generate online catalog and decide how badly you want one. They're US$49.00. Ouch.