Citizen J250 Instruction Manual page 21

The power reserve level is indicated in the four stages shown below.
Level
Power reserve
level scale
Duration
340 - 300 days
(approx.)
Power reserve is
sufficient.
Meaning
3 2
E E
300 - 200 days
Power reserve is
OK.
OK for normal use
Checking the current power reserve
1
E
200 - 4 days 4 days or shorter
Power reserve is Power reserve is
getting low. insufficient. The
insufficient charge
warning will start
soon.
Charge immediately.
0
E
19