This battery is permanently installed.

But look at it this way. This thermometer is far too thick for a 300 gram steak. And the larger pieces cost the same at the butcher's as this sensor as such. So it's no big deal if the battery dies after 2 years. But I don't think so, the Plus is already an improved version. Google has also not spit out any posts about defective batteries imho you can access. ps. before Black Friday the prices rise so that the promotions light up ;-)