Battery powered bluetooth speaker

After my 2007 MacBook Pro finally died :-( I decided to recycle some of its parts. The sound quality of its tiny speakers was always quite good, so I made this battery powered bluetooth speaker. It's small enough to easily fit into your laptop bag and runs for many hours of the 1200 mAh battery. The speaker grills are cut from the MacBooks original ones.

Happy making.

##### Versions
- v1.0: Initial post.
- v1.2: Improved housing rigidity, optimised grill recess.
- v1.3: Optimised lip "seal". Added printable grill.