Citizen Nighthawk BJ7000-52E ユーザーズマニュアル

Time required for recharging may vary according to the design (color of the dial, 
etc.) and operating environment. The following table will serve you as rough 
reference.

* The recharging time is the time when the watch is continuously exposed to

radiation. 

Full recharging time ... The time for fully recharge from stopped. 

(Empty to full) 

One day usage .......... The time required for the watch to run for one day with 

one second interval movement

14

15

Illuminance 

(lux) 

500 

1000

3000

10000

100000

Environment 

inside an ordinary 

office 

Time required 

22 hours 

11 hours 

3 hours

30 minutes

1 hour

14 minutes 

One day 

usage 

1 hour

30 minutes 

45 minutes

15 minutes 

5 minutes 

2 minutes 

Empty to full 

320 hours

158 hours 

53 hours 

17 hours

6 hours

60-70cm (24-28in.) under

a fluorescent light (30W)

20cm (8in.) under a

fluorescent light (30W)

Exterior, cloudy

Exterior, summer,

sunny 

From the stop state 

to the one second 

movement