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    Senior Member arrowsmith's Avatar
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    Battery story

    The 2013 TW i just got with 45 miles on it,still had the original battery. It was dead and low on water. I added water and charged it. I let it set for three days and the voltage (12.8 by my meter)stayed the same. So I installed and so far is still working.

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    Senior Member RockyTFS's Avatar
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    A lead acid battery can take such abuse. Once or twice!
    However, it has lost a considerable amount of its life expectancy, and being 4 years old to start with, I wouldn't expect it to last more than a year. Murphy's Law says that it will fail at the worst possible time and in the worst possible place.
    I would check it every month by leaving the headlight on for half an hour. If it fails that test it's not long for this world.
    Rocky
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    Senior Member arrowsmith's Avatar
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    Quote Originally Posted by RockyTFS View Post
    A lead acid battery can take such abuse. Once or twice!
    Murphy's Law says that it will fail at the worst possible time and in the worst possible place.
    Like at the bottom of a hill and the only way out is up?

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    Senior Member admiral's Avatar
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    Quote Originally Posted by arrowsmith View Post
    The 2013 TW i just got with 45 miles on it,still had the original battery. It was dead and low on water. I added water and charged it. I let it set for three days and the voltage (12.8 by my meter)stayed the same. So I installed and so far is still working.
    I too have had pretty good luck with my stock batteries as long as I use distilled water. Tried it with tap water with one battery once, which I knew better, and that battery didn't last long. Losing battery electrolyte and overlooking/not maintaining the level is one of the biggest mistakes we make whatever the cause of loss of said electrolyte.

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    Ken
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    Senior Member Ken's Avatar
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    I push the batteries as far as I can but then I have a kick starter.

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    Senior Member Tweaker's Avatar
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    Yeah if they stay undercharged they get sufated and then the deposits can short the cell rendering them dead. The deposits lower the capacity of the cells. There are youtube videos on restoring LA batteries by draining and cleaning out the cells and adding new acid. Also treating them with epsom salts which breaks down the sufate deposits. All of this kinda of depends on the quality of the lead plates inside if the battery isn't that old doing these things can restore capacity. It's kinda not worth it in our case as you can just buy a new SLA or AGM for @$20.
    Last edited by Tweaker; 05-18-2017 at 02:18 PM.
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    Senior Member scotti158's Avatar
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    Time to install a kick starter, a dead battery's best friend.
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    Senior Member arrowsmith's Avatar
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    Quote Originally Posted by scotti158 View Post
    Time to install a kick starter, a dead battery's best friend.
    Have one from my $100 motor but is not installed yetIMG_0001.JPG
    Ken likes this.

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    Senior Member Fred's Avatar
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    One can always do a load test at home to evaluate a questionable battery. With the battery charged to say 12.8 volts or so disconnect the spark plug lead and engage starter motor for 20 seconds or so while monitoring decaying voltage across your battery. Should voltage drop below 9.6 volts during draw test conventional wisdom says battery is inadequate.
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    Senior Member RockyTFS's Avatar
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    Yeah, that's a better test than my headlight test!
    Ken and Smitty Blackstone like this.
    Rocky
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