- If you used the Dallas DS-1287 in the Elf-2k disk, UART and RTC card
then you might be interested in this method of replacing the battery
that is inside of this integrated clock chip when it fails. Also a
number of older PC motherboards used the DS-1287.
Depending on the source of a replacement chip, the "new" one might be
as old as the one that is in your computer. This writeup offers an
alternative but it's not for the "faint-of-heart" though! Hasty work
may permanently do-in the failing chip anyway.