check age. Supposed to be changed every 10 years

來源: RomaVacation 於 2025-02-25 10:10:56 [] [舊帖] [給我悄悄話] 閱讀數 : (194 bytes)
回答: 在線急問 由 安小愛 於 2025-02-25 09:09:50

Might change them all if you don't know history or could not find out age easily. 

It is supposed to chirp when battery voltage drops low. 

 

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