That's
dead, I'll replace it. Should I also change the black bar-
shaped 7.5 v cell? It's dead too, and I don't know what it's for.
I'm not sure if the 7.5V bettery is required for the machine to power
up, on the other hand, it wasn't _designed_ to be dead, so it can do no
harm to replace it.
It isn't required. Replacing mine did no good (ie powered up but didn't
retain all settings, with old or new battery). New ones, being NiCd,
are supplied fully discharged anyway.
Philip.