Lifetime Of Backup Battery - Panasonic FP E Series User Manual

5.7.4 Lifetime of Backup Battery

The life of the backup battery will eventually expire and therefore it is important to replace it with a new
battery periodically. Refer to the table below for a guide as to when to replace the battery.
Item
Battery lifetime
Description
220 days or more (typical lifetime in actual use: approx. 840 days at
25°C/70°F) (Suggested replacement interval: 1 year)
(Value when no power at all is supplied)
5-23