cMoS Battery Failure

It's pretty easy to replace the battery in there. The battery you'll need is CR2032.

Follow the steps in this support post for instructions on opening up your console:

https://support.etcconnect.com/ETC/Consoles/Eos_Family/Ion/How_to_Open_an_Ion

Faced the same issue. Talked to one guy, and he said that I could try replacing the battery. The only question left on the table is which one to get if the original one is out of stock everywhere?

The CR2032 battery is super common and can be purchased almost anywhere (even in my local grocery store). Are you concerned about brand? Any major brand (i.e. Duracell, Energizer) will be fine.

Have you looked at this article yet?  It explains the version of the CMOS Battery you will find in an Ion.

support.etcconnect.com/.../What_Happens_When_I_Remove_the_BIOS_(CMOS)_Battery?

If you're still dealing with the CMOS battery issue, you can totally replace it yourself. It’s a pretty easy fix, and no need to send the ION off for repair. A lot of people mention using the CR2032, but for smaller devices like watches, I’ve found that the SR626SW works really well. If you’re still trying to figure out what to get, the SR626SW equivalent is a solid option I’ve used before in similar situations.

Edited by eos moderator, cf. reply below.

ETC as manufacturer of those consoles strongly recommends using the specified replacements.

CR2032 (that's the one you're supposed to use) supplies 3V, SR626SW supplies 1.5V. Moreover is SR626SW the wrong size.

So please, use the battery we as the manufacturer of your lighting console suggest.