DEC690 BIOS battery replacement

[Diwrosa]

I've just updated my DEC690 to OPNSense 24.1 and when it came up the date was set to 2017! A few minutes later the date was corrected (presumably by NTP). This looks like the battery has run out, is it easy to replace it in these units? Also, does it use a CR3032 or something slightly more "exotic"?