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Battery life

Community Member

I’ve got a nest protect 

why do my battery’s only last 2 weeks unit is8 years old


Gold Product Expert
Gold Product Expert

Hi @Patty717171 

Did you have the first generations or the second generation?
If you have the first generation it already should be replaced after 7 years.
If you have the second generation you should get up to 10 years. Maybe worth a shot cleaning the device to see if this helps?

For more information check THIS link.

Community Specialist
Community Specialist

Hello everyone,


@Patty717171, thanks for posting here in the Community. To confirm, what is the make and model of the battery you installed? The recommended battery is Energizer Ultimate Lithium AA (L91). Hit this link for more information. What RXShorty had shared is about the expiration of the Nest Protect. All carbon monoxide (CO) alarms expire because their sensors have a limited lifespan. To comply with certification standards, 2nd gen Nest Protect has to be replaced after 10 years, while 1st gen Nest Protect has to be replaced after 7 years.


Looking forward to your response.


I appreciate the help, RXShorty.




Community Specialist
Community Specialist

Hey there,


I wanted to check in and see if you had any questions. Please let me know, as I would be happy to assist, and answer any you may have.

Best regards,

Community Specialist
Community Specialist

Hi Patty717171,


I just wanted to jump in here to make sure that you saw our response. Please let me know if you have any other questions or concerns as I will be locking this in 24 hours.