If you get an error message when you start the Octatrack saying: “BATTERY LOW”, you should change the battery. The battery is a CR 2450 Li-Mn 3v.
CHANGING THE BATTERY
Unscrew all the M3 Hex nut screws on the top panel.
Remove the top panel and disconnect two cables (three on MKI) between the UI PCB and the CPU PCB.
On the bottom PCB (CPU) you see the battery holder on the left side.
Gently remove the battery from its holder and replace it with the new battery.
Reconnect all the cables and make sure that the pins are placed correctly and reach all the way down,
Re-attach the top panel.