The Cuckoo CRP-N0681F rice cooker doesn’t run Doom (yet; see below), but it can talk, sing and chuff like a steam locomotive. It also prepares all kinds of rice. One day, the display went blank. The next time I plugged it back in, it greeted me in Korean and wanted me to set the clock. It seemed that the internal battery had died and the user manual agreed with that:

About Lithium battery
– This product contains lithium battery for improving blackout
compensation and time. Lithium battery lasts 3 years.
– When current time is not displayed on the screen, it means the battery is exhausted. It should be replaced.

Unfortunately, that’s all what the manual had to say about this topic. A quick search on the internet didn’t reveal any clues about the battery replacement, so I opened it up to have a look inside.