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This 9v battery contained six cells stacked like a layer cake
(lemmy.sdf.org)
This is for strictly mildly interesting material. If it's too interesting, it doesn't belong. If it's not interesting, it doesn't belong.
This is obviously an objective criteria, so the mods are always right. Or maybe mildly right? Ahh.. what do we know?
Just post some stuff and don't spam.
I used to take apart 9v batteries to get AAAA cells for my laser pointer