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Home Improvement

Long Life Carbon Monoxide Testers

2020-05-18 00:00:00 199190  bosco2
I have three CO testers by Kidde. Two of which have removal batteries. The two with replaceable batteries reached unit end of life within hours each other after operating for countless years of service with never needing batteries. They both give off a death chirp to let you know and display END on the LCD screen, a nice touch by Kidde.

They now sell the same units or 10 year long life versions with fixed batteries for twice as much as the ones with replaceable batteries that seem to last about as long.

Is there a case for the $40 version vs the $20 version?



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Long Life Carbon Monoxide Testers
2020-05-18 00:00:00 199198  Handson
Not an electrical engineer, but the Lithium cells are probably a good idea in certain circumstances. I got them for my elderly Dad as I knew he would not be checking them.

That said your empirical evidence shows virtually no life span difference with never changing batteries so that sounds better to me as the lithium version can never be changed if they fail. ....
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