When you see the finished product, you’ll find the box stuffed to brim with very little room for any additions. To that end I am looking at a home made clear plastic enclosure – a throwback to the kits we used to build in the 1970s that allowed everyone to look at what was inside the box without having to open it!
If that doesn’t float your boat, you can buy spray paint that adheres really well to the plastic in a variety of colours, so you can customize the battery pack to look like anything you want.
Cheers.