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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 Description
Battery lifetime 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)
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