Elektron event is over, so I can finally reveal my internal battery-powered Digitakt.
Works for 5+ hours. Can power a second Elektron machine by simply connecting the DC inputs. Both will work for 2 hours then, good enough for a full live set. Charges with a standard Elektron power supply. It can be plugged in and removed at any time, no need to turn off the machine to move from battery power to wall power and back. A more powerful PSU may get an additional hour of play though. There are no visual changes to the device except for 200 grams added weight and no heat build up even when powering multiple machines at the same time. No changes to Digitakt circuitry were required, the whole thing is just soldered on top. Still the warranty is void of course.
I don’t have any specific plans to offer this as an upgrade yet due to logistics and all, but leave a comment if you’re interested.