Konica Minolta cm-5 Instruction Manual page 166

Symptom
Measurement data or
settings are not held
in memory, and
disappear
immediately.
E164
Check Point
The instrument's backup battery
may be low immediately after
purchase or following a period of
prolonged non-use. Turn the
instrument ON to charge the backup
battery.
Under this condition, the battery can
be fully charged in 72 hours.
Action
The backup battery has an expected service life
of approximately ten years. If you find that the
instrument fails to retain data in memory even
after the battery has been fully charged,
however, then it is likely that your battery has
reached the end of its life and requires
replacement.
Note that you cannot replace the battery yourself.
For information, please contact a KONICA
MINOLTA-authorized service facility.