Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: Works as advertised, depending on the type of smoke alarm
Review: I had 3 of these installed in smoke alarms in May 2003, so was disappointed when two of them failed after about 4 years, and the last one just began to beep after exactly 5 years.But then I discovered that the alarms I'm using have dual sensors (First Alert SA301), containing both an ionization and a photoelectric [these are not hard-wired, the battery does it all]. Therefore, if in reality, the batteries are running two detectors at once, I guess it shouldn't surprise me that they lasted half as long as advertised. Also, my alarm doesn't qualify for the 10 year warranty, because it contains a photoelectric sensor - the warranty is for ionization sensors only.Cost wise it's probably a wash, one could buy several alkalines for the cost of this one. But the savings is on time: not having to change the batteries as often.
