As a smoke alarm’s battery nears end of life, the amount of power it produces causes an internal resistance. A drop in room temperature increases this resistance, which may impact the battery’s ability to deliver the power necessary to operate the unit in an alarm situation. This battery characteristic can cause a smoke alarm to enter the low battery chirp mode when air temperatures drop. Most homes are the coolest between 2 a.m. and 6 a.m. That’s why the alarm may sound a low-battery chirp in the middle of the night, and then quit when the home warms up a few degrees. "foonia" wrote in message news:qdtcj1$5d6$1@trimpas.omnitel.net... Butent, kazkodel jiems uzeina nakti galutinai issikrauti Herkus<Nera@mailo.net> wrote: > Kiek tie ilgaamziai detektoriai kainuoja? Kasmet keiciu kronas maniskiams. > Bet uzknisa ne kastai, o pypsejimas nakti issikrovinejant. -- > "foonia" <fooniaNespamink@googlius.kom> Wrote in message: > > As pradejau galvoti kad tie su 10 metu tempianciomis beterijomis ne > > tokia bloga investicija ( klausimas kiek realiai trauks) gera krona > > kainuoja ~2€, tad per 10 metu bent 20€ i jas sukisi, yra licio "kronos" > > irgi tipo traukia 10 metu. Paprastiem 5€ kainavusiem detektoriam po metu > > jau visiem kronos pakeistos.Doncius<nera@email.lt> wrote: > Reik su > > baterijom. Kokie geri? Ir gerai butu, kad bent metus veiktu > nekeiciant > > bateriju.-- foonia -- foonia