Panasonic FP0R User Manual page 39

Predicted life of built-in backup battery
FP0R User's Manual
The number of days the backup battery remains effective (backup time)
depends on the charging time. If the battery has been fully charged (72
hours at an ambient temperature of 25°C), the battery will function for ap-
prox. 50 days.
x Charging time (hours)
y Backup time (days at 25°C)
The backup time will vary according to the ambient temperature when the
battery is charged.
Ambient temperature when charged:
70°C
25°C
-20°C
The life of the built-in backup battery varies depending on the ambient
temperature while the CPU is on (energized). The temperature when the
CPU is off (not powered) has little influence on the battery life.
Ambient temperature
55°C
45°C
40°C
35°C
34°C
The built-in backup battery cannot be replaced.
Backup time:
14 days
50 days
25 days
Lifetime of built-in backup battery
430 days (1 year)
1200 days (3 years)
2100 days (6 years)
3300 days (9 years)
10 years
CPU types
39