They later released BIOS updates for some of them that removed this limitation, allowing third party batteries to be installed. The current BIOS is R1120Y4, and I'd like to know if another BIOS revision was ever released after this one.īasically, Sony released a bunch of laptops which would detect if you tried to replace the battery with a third party replacement.
I'm fixing up an old Sony Vaio VGN-NW20EF/S.
