Nice display.
Take a look at the old Cellpro 4s lithium battery chargers FMA used to make (might still). It is just a circuit board with standoffs that hold a metal face plate/display with heavy clear shrink wrap around the whole assembly.
A nice sticker covered the face plate so it looked professional. No case needed (shrink wrap is the case) and easy access to the mode switch and cable connectors. I think that is how they made them when they were a start up.
Cellpro 4s pics:
http://www.bing.com/images/search?vi...x=4&ajaxhist=0
http://www.bing.com/images/search?vi...=17&ajaxhist=0