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Thread: Dead Battery Issue

  1. #1
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    Default Dead Battery Issue


    I keep having a dead cranking battery on my crappie rig. I figured it was the battery not holding a charge, so i bought a new one end of september. This battery is connected to my lights, bilge, and two Lowrance HDS units. Also, the livewell timer. None of the switches are on. New battery was fine while i was taking it to the lake in october. It sat for a month and is stone dead. Charged it overnight and was all good again. Anyone have any input? Something is causing a drain. Switch is also off. Thinking of disconnect when not in use if i can not find the issue.

  2. #2
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    I have HDS units also and I wondered if they have a residual drain like TVs and other electronic devices even when turned off. I keep my charger plugged in all the time so if mine is draining the charger would have covered the drain and I would not notice it.
    Might try disconnecting them and see if it still happens.
    Mark 1:17 ...I will make you fishers of men
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  3. #3
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    I USE 1 BATTERY FOR CRANKING ONLY
    1 FOR ALL MY SONARS
    AND 1 FOR FISHING LIGHTS
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  4. #4
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    You have a little light or something making contact and slowly draining your battery= If you have Panoptics, put a on/off switch on transducer. They draw current when not in use.
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  5. #5
    gabowman is offline Super Moderator * Crappie.com Supporter
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    I found that my trolling motor was a bit warm when my boat was sitting in the barn on fully charged batts so I now use the disconnect that was already built into my boat (push button switches) that kills all the power from my batts to the electronics. My motor will still crank without connecting those switches but that is all that works until I push in those buttons.
    Health nuts are going to feel stupid someday, lying in hospitals dying of nothing.
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  6. #6
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    Cray is offline Crappie.com 2019 Man of Year, Supermod & Moderator of the Mechanics Forum * Crappie.com Supporter
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    Here is one thing you can try. It needs to be a little dark so you can see it. Disconnect your grounds, take one at a time and touch them to the post and see if you get a spark. Then if you do trace everything connected to that ground until you find what is drawing power. In the scenario you describe I don’t see anything that would kill a battery in a month. Search out any hidden light that could be on that you might not see like compartments or under dash, maybe instruments.
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  7. #7
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    you need to install a perko switch to isolate your battery. Most outboards have computers built in and will draw your battery down. My boat was doing same thing, installed perko switch and fixed problem
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  8. #8
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    Kenny, I agree with Hilljiger. I would install a master power switch that everything except the float switch for your bilge pump runs through.
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  9. #9
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    An onboard charger will cure the problem, probably a low voltage draw from sonar or other electronic devise.Transistors need the low voltage, even when off
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  10. #10
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    Quote Originally Posted by trypman1 View Post
    You have a little light or something making contact and slowly draining your battery= If you have Panoptics, put a on/off switch on transducer. They draw current when not in use.
    No light I am aware of. No panoptics unfortunately.


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