Orient KU(RMC) Instruction Manual page 5

4 The watch comes equipped with a battery end of life indicator.
If the small second hand begins to advance two tick marks for every
movement, it means that the battery is nearing the end of its life and will
need to be replaced.
Contact the place of purchase or your nearest ORIENT authorized service
center immediately for assistance with battery replacement.
5 Steps to be taken after the battery is replaced
After you have the battery replaced, be sure to set the time and set the
stopwatch hands to the "0" position.
(Refer to  SETTING THE TIME AND ADJUSTING THE STOPWATCH
HAND POSITION (Hands for time display and stopwatch hands) for more
information.)
(4) Shock
1 Be sure not to carry the watch when you engage in strenuous
sports, whereas playing such light sports as golf, etc., will not
adversely influence the watch.
2 Avoid a violent shock such as dropping the watch on the
floor.
(5) Magnetism
1 If the watch is left at a location with strong magnetism for an extended
period of time, the components may be magnetized, resulting in
malfunction. Be careful.
2 The watch may temporarily speed up or slow down when exposed to
magnetism. Precision is restored when placed away from magnetism. In
such a case, reset the time.
(6) Vibration
The watch may lose precision if subjected to strong
vibrations such as from riding motorcycles, using
jackhammers, chain saws, etc.
(7) Temperature
In the environment below and above the normal temperatures
<5°C~35°C>, the watch may malfunction and stop.
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