https://wccftech.com/sony-reportedly-aware-ps4-cmos-ps5-battery/

Sony is said to be aware of the recently reported PS5 and PS4 CMOS issues and is reportedly investigating the matter.

As reported earlier this month, Sony’s PlayStation 4 will no longer play digital or physical games offline with a bad or missing CMOS battery. This also appears to be the case on PS5, although Sony’s next-gen does still seem to be playing a select number of physical titles once the CMOS battery is removed. The issues with the CMOS battery inside the PS4 were first brought up last month by game preservation team ‘Does it Play’.  After the issue came to light, fans wrote up a template directed at Sony outlining the issue and key concerns.