Just would like to point out that Digitakt, Digitone, Rytm MKII, Four MKII, Octatrack MKII and Heat MKII all use endless potentiometers which has a much, much longer lifespan than encoders. The new button mechanisms are also much longer lasting than the previous generation of machines.
We also do not use internal batteries anymore, except for in the Octatrack MKII. (Which uses a very common CR2450 battery)