https://www.googlenestcommunity.com/t5/Nest-Protect/warranty/m-p/156268#M2888 <P>I have purchased a few smoke alarms brand new in the box and sealed. When does warranty start and is there an expected life of any sensors if the product was manufactured in 2018. Does the life expectancy start once it starts getting used or the moment its manufactured?&nbsp;&nbsp;</P> Thu, 05 May 2022 14:47:51 GMT levi0341 2022-05-05T14:47:51Z https://www.googlenestcommunity.com/t5/Nest-Protect/warranty/m-p/156268#M2888 <P>I have purchased a few smoke alarms brand new in the box and sealed. When does warranty start and is there an expected life of any sensors if the product was manufactured in 2018. Does the life expectancy start once it starts getting used or the moment its manufactured?&nbsp;&nbsp;</P> Thu, 05 May 2022 14:47:51 GMT https://www.googlenestcommunity.com/t5/Nest-Protect/warranty/m-p/156268#M2888 levi0341 2022-05-05T14:47:51Z https://www.googlenestcommunity.com/t5/Nest-Protect/warranty/m-p/156540#M2893 <P>Warranty starts on the date of purchase and life expectancy starts on the date of manufacture that is printed on the bottom of the device.</P> <P>&nbsp;</P> Thu, 05 May 2022 20:37:45 GMT https://www.googlenestcommunity.com/t5/Nest-Protect/warranty/m-p/156540#M2893 Patrick_Caezza 2022-05-05T20:37:45Z