Google Nest Protect, the smoke and carbon monoxide detector device is suffering from some issues.

According to multiple reports, the battery of some 1st and 2nd Gen Google Nest Protect devices are draining excessively and overheating for some users.

Google Nest Protect battery draining issue

User reports from Google Nest Protect (1st and 2nd Gen) point out that some of their devices are facing the aforementioned issue (1, 2, 3, 4, 5, 6, 7, 8).

The problem would begin to appear after a period of use (normally for a few years). Therefore, you can think of natural battery capacity degradation as the issue. So, replacing them should resolve it.

But, even after replacing the batteries with the same ones, the issue reportedly continues to happen.

Nest Protect Gen 2. Batteries have been fine for years all of a sudden they register low and I replace with the same Lithium batteries and within a month or two the unit says battery low. The batteries cost $20 so if i have to replace them every few months it will be cheaper to purchase a new unit. I have 2 nest protects purchased within a few weeks of each other and the other one is still on the original batteries. So there must be something wrong with the unit that eats batteries. Please advise thanks
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Google Nest Protect battery overheating issue

Another problem reported in the Google Nest Protect batteries is excessive overheating. And, this can become so serious that even touching the battery would be dangerous for the user (1, 2).

Hi I was awoken early this morning by my Nest protect chirping a low battery warning . I’d had no normal notification on either the app or by the voice control to inform me to change batteries. But the very worrying part was one of the batteries was so hot I couldn’t even touch it. I note that this problem has been reported quite frequently on community forum but can’t find any answers as to whether it’s just safe to replace batteries. To be honest not sure I feel safe as my battery felt near to catching fire.
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The problems reportedly occur with recommended batteries as well

For Google Nest Protect, it is recommended to use Energizer Ultimate Lithium AA (L91) batteries. But, the battery drain and overheating issues are still present even with those.

I have 3 Nest protect units around the house and I only experience the quick drain on batteries in one of the units. Using Energizer batteries. I see there’s a recommended battery which I am happy to try but suspect it won’t make a difference given the other two units are lasting well over a year. The problem unit has had new batteries in 2021 on Mar 15, May 12, July 11, Sept 15 and I just got a warning this morning Oct 14) that I should replace them soon. I don’t mind replacing batteries every year or so, but every 2 months is expensive.
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At the moment, that is all that is known about the situation. If there is any new development in this matter, we will update this article. So stay tuned.

Featured Image: Google

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Jean Leon
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A tech enthusiast since ever. I like to always be up to date on the latest news in the industry and write about it. Twitter: @jean_ERdC

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