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· When charging using the light from an incandescent lamp, charge while being
careful that the watch does not become excessively hot by placing at a distance of
at least 50 cm (20in) from the lamp.
7.Replacing the Secondary Battery
Unlike ordinary batteries, the secondary battery used in this watch can be repeatedly
charged and discharged and is not required to be periodically replaced.
CAUTION
Never use another battery different from the secondary battery used in this watch.
The watch structure is so designed that a different kind of battery other than that
specified cannot be used to operate it. In case a different kind of battery such as a
silver battery is used by some chance, there is a danger that it will be overcharged to
burst, causing damage to the watch and even to the human body.
