Citizen Eco-Drive BN4021-02E - Power reserve level indication

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The power reserve level
Level 3 2 1 0
Level indication
Approximate
duration
340 - 280 days 280 - 180 days 180 - 4 days 4 days or less
Meaning of the
level indication
Power reserve
is sufficient for
all features and
functions.
Power reserve is
sufficient for all
operations at this
level.
Power reserve is
getting low.
Power reserve is
not sufficient for
normal operation.
OK for normal use
Charge immediately.
You cannot use measurement functions while the power reserve level is in “0”.
However, you can see the current time.
Frequent use of measurement functions makes the duration shorter.
Checking the current power reserve