The battery cover to the original iclicker plus breaks easily, and when the battery cover is gone, the iclicker fails to turn on. This could be disasterous if your class participation depends on a working iclicker! I have designed and printed a replacement that snaps in and actually works better than the original. The original battery cover was too loose from the factory, leaving a poor connection. I quickly fixed this in class with a shim I fashioned from a folded piece of paper. I took this into account when designing this cover and added additional support for the battery.
The print requires a brim and support. I also recommend printing at 100% infill and a small layer height.