Citizen CC4054-68L Instruction Manual page 28

Checking the power reserve and power generation amount
Indication of power reserve in levels
Level
Power reserve
level scale
Duration
1.5 - 1 year
(approx.)
Power reserve
is sufficient.
Meaning
OK for normal use.
26
4 3
1 year - 10
months
Power reserve is OK.
2
10 - 4 months - 5
4 months days
Power reserve
is getting low.
Charge immediately.
1 0
5 days or
shorter
Insufficient
charge
warning has
started.