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Two days of my door lock batteries (lemmy.nz)
submitted 2 days ago by to c/homeassistant@lemmy.world
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I replaced them in April. Should have had another 6 months or more but instead the charge is now at 1%... previous batteries lasted almost 18 months.

No particularly interesting history. Automations locked or unlocked it about 6 times over that 2 day period.

Not a question, just a frustration.

Home Assistant graph showing the day and time along the bottm (about 12 noon on 10 November to 12 noon 12 November) and the graph shows a line largly straight going from 50% to 1% over this two day period.
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[–] 8 points 2 days ago (3 children)

I never even realised they make lion battery in aa size. Its pretty cheap too, gonna buy a bunch of them soon.

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  • [–] 8 points 1 day ago (2 children)

    just be careful what you use them with

    Some brands have unusual voltage graphs over the battery life, which can confuse devices that rely on the alkaline/NiMH voltage drop to detect if they are low on power

    Some of the lithium ones set their voltage to a fixed value and abruptly die when they run out. This is especially problematic for devices like smoke detectors, as they can't notify you if they are running low

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  • [–] 4 points 1 day ago (1 child)

    I did some research comparing them but I think I am gonna stick with usual nimh batteries for my use case. Unless the device is very picky about voltage level, NiMh seems to be recommended over Li ion, for battery life and cost ig. Maybe I will get 1 just to test it out, some claim to have a proper voltage drop but I am sceptical. Quite annoying how hard it is to find good ones outside of Amazon -_-

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