They take a licking and keep on ticking...
I did my regular battery maintenance today on my Costco 6v. SG was 1.275 to 1.28 on all cells with a +3 for temperature (1.283). I have a quality float type hygrometer that is probably 30 or more ye...
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Sounds like you've taken care of them to get those years. Most batteries die of abuse and neglect.
Unless you are checking humidity, you are using a hydrometer.
Unless you are checking humidity, you are using a hydrometer.
