I can’t believe my Kronos is already over 10 years old. But it is, and as a consequence, it recently complained about a drained battery.

To do so, I used the following:

• CR2032 battery
• Some pillow or similar to prevent the controls from being damaged
• Screw driver
• Small wooden or plastic stick
• Rubber gloves
• Anti-static wrist strap, if possible (admittedly, I had none)

Here’s what I did:

• Disconnect all cables from the Kronos.
• Place it upside-down on some smooth surface. Use pillows or similar to grant some clearance for its controls.
• There are two different kinds of screws. Mark the bigger ones e.g. by using some tape.

• Remove all screws from the bottom panel, except the screws of the rubber feet. Keep the two sizes separated from each other.

• Remove the bottom panel (a screwdriver in one of the drillings should help to lift it).

• Put on the gloves and the anti-static wrist strap (aka e-bracelet), if possible.
• Locate the battery slot on the left hand side. Use some wooden or plastic stick to bend the clip backwards, then remove the battery (see topmost image).
• Insert a new battery, without touching it with your fingers to prevent corrosion (hence the gloves).
• Reattach the bottom board with the screws according to the markers. Tighten the screws, starting with the ones in the middle. Ensure to forget none.
• Boot up the Kronos. Press the DISK button. Select the file, then the utility page. From the menu in the top right corner, select »Set Date/Time«. Use the value controller to enter the correct data. Press OK.
• Reboot the Kronos.

That’s it. The battery alert should be gone for the next decade.