For the 2d rendering, you should include the dimensions.
I assume you are in the process of making the top lid for your case. Dont forget you need to include holes for your button and LED. Also you need to think about how the lid and the bottom part of your case will stay together
You can also smooth the edges/corners of your casing using the 'fillet' feature on solidworks.
Latest version looks good! I would consider how you want the top and bottom of the enclosure to "join" to one another. Also, how do you plan for the battery to be secured internally.
CAD drawing and 3D rendering in /Mechanical folder