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Thread: AT Pro battery Indicator

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  1. #1

    Apr 2012
    3
    All Types Of Treasure Hunting

    AT Pro battery Indicator

    Just got a new AT Pro. The battery indicator appears to be flakey. Sometimes shows all bars, sometimes none. I know a call to Garret is probably warrented, but has anyone run across this? New charged nicads do not eliminate the issue.

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  3. #2
    us
    what hath god wrought

    Feb 2009
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    tectin crap
    Try new good batts, if it is still flaky, its a factory case. As common sense would dictate.
    Sandman and Sandman like this.
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  4. #3
    us
    Nov 2011
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    I don't think nicad;s are the correct voltage. You want 1.5 volts not 1.2 volts. That's real close to the cut-off voltage.

    I recall some batteries that did not fit right in a laser I had. I think they might have been "Ultra" (Duracell, I think) They were just a tiny bit too small and did not make good contact. I would try some new standard alkaline AA"s.

    Also make sure battery is installed correctly in the detector (look at photo in the manual).
    Last edited by signal_line; Jul 15, 2012 at 07:20 AM.
    Where your heart is, there you will find your treasure.

    O God of compassion, You alone can justify me and Your will never reject me when I, contrite, approach Your Merciful Heart, where no one has ever been refused, even if he were the greatest sinner. For Your Son assured me: Sooner would heaven and earth turn into nothingness than would My mercy fail to embrace a trusting soul.

  5. #4
    Charter Member
    us
    Director-Search & Recovery Team of Oakland County.

    Aug 2005
    In Michigan now.
    Excal 1000, Excal II, Sovereign GT, CZ-20, Tiger Shark, Tejon, GTI 1500, Surfmaster Pulse, CZ6a, DFX, AT PRO, Fisher 1235, Surf PI Pro, 1280-X, many more because I enjoy learning them.
    11,543
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    "Also make sure battery is installed correctly in the detector (look at photo in the manual)." Excellent advice! Even with my experience I have been guilty of this. Once came home from a long drive to a beach because batteries were dead only to learn at home that two batteries were inserted wrong. Duh.
    (C) Sandman, 2005. All Rights Reserved.
    "TIME IS THE ONLY THING YOU NEVER GET BACK, WHY WASTE IT SWINGING A DETECTOR THAT ISN'T UP TO THE TASK."

  6. #5
    us
    Apr 2012
    The Jersey Shore
    Ace350/ATpro/Excalibur1000/ Eldorado/BandidoII uMax/Silver Sabre uMax/Compadre/ Garrett Pro-Pointer/Lesche digger model 75/ RTG stainless Beachmaster scoop/Stealth S3i Sugarsand Scoop
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    Quote Originally Posted by signal_line View Post
    I don't think nicad;s are the correct voltage. You want 1.5 volts not 1.2 volts. That's real close to the cut-off voltage.

    I recall some batteries that did not fit right in a laser I had. I think they might have been "Ultra" (Duracell, I think) They were just a tiny bit too small and did not make good contact. I would try some new standard alkaline AA"s.

    Also make sure battery is installed correctly in the detector (look at photo in the manual).
    I use Energizer NIMH rechargables and a few other rechargable brands in my AT. Yes they are 1.2 volts and Yes they work fine. It even says you can use them in the manual. Speaking of the manual, read the manual on doing a factory reset if you have confirmed that the batteries you are using are properly inserted and fully charged.
    If those two things don't fix the problem then call Garrett customer service they are great and very easy to deal with.
    One must be smarter than the equipment they are working with!

  7. #6
    us
    Nov 2011
    699
    70 times
    All Types Of Treasure Hunting
    Yes the manual says NIMH are okay but it doesn;t say anything about NICAD. The NIMH run at a higher voltage than NICAD's when under load. Whether that is enough to make a difference when fully charged, I don't know. But it's one variable to eliminate when searching for the problem. Another thing I would check for is a broken or cracked battery holder.
    Where your heart is, there you will find your treasure.

    O God of compassion, You alone can justify me and Your will never reject me when I, contrite, approach Your Merciful Heart, where no one has ever been refused, even if he were the greatest sinner. For Your Son assured me: Sooner would heaven and earth turn into nothingness than would My mercy fail to embrace a trusting soul.

  8. #7
    us
    what hath god wrought

    Feb 2009
    Gateway to the 1000 Islands
    Sometime(s)
    3,823
    585 times
    tectin crap
    NiCads are a terrible choice for metal detectors. In my opinion, they are not a good drop-in alternative. Voltage is too low at 1.2. But they are useful if you want to design custom batteries. If you can design a NiCad pack, add cells as required to get to the working voltage. If the tecter uses four carbon or alkalyine cells, 1.5v in series, that is 6v. Use five NiCads 5 x 1.2 = 6v. The NiCad no-load voltage will measure about 1.4v x 5 = 7v, but under load it drops to 6v, just right. Good quality properly charged NiCads will read 1.4 volts no load. If I get cells that are 1.37 volts fully charged, they are suspect. NiCads hold a lot of juice, it's amazing. I have an eighteen volt machine. I made a battery using 16 aa NiCad cells in series. Fully charged it is bit above 22v. I have run this battery for about fifteen years and have saved a lot of money on nine volt batteries. It is just about stupid how much a 9 volt battery costs nowadays. It should be like fifty cent or so.
    Last edited by gleaner1; Jul 15, 2012 at 05:14 PM.
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  9. #8
    us
    what hath god wrought

    Feb 2009
    Gateway to the 1000 Islands
    Sometime(s)
    3,823
    585 times
    tectin crap
    I am going to design and build a 5 cell, C size battery pack that is fully waterproof to ten feet for my atpro. Pics soon. No, really.

    Click image for larger version. 

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    Last edited by gleaner1; Jul 15, 2012 at 06:00 PM.
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  10. #9
    us
    Apr 2012
    The Jersey Shore
    Ace350/ATpro/Excalibur1000/ Eldorado/BandidoII uMax/Silver Sabre uMax/Compadre/ Garrett Pro-Pointer/Lesche digger model 75/ RTG stainless Beachmaster scoop/Stealth S3i Sugarsand Scoop
    529
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    Quote Originally Posted by gleaner1 View Post
    I am going to design and build a 5 cell, C size battery pack that is fully waterproof to ten feet for my atpro. Pics soon. No, really.

    Click image for larger version. 

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    I see you are serious. That's a good idea. I may have one to add to it.
    Is there a way to use that empty battery slot to add another battery without upping the voltage? That way it will last all day without running outta juice. I forgot if its in series or parallel.
    One must be smarter than the equipment they are working with!

  11. #10
    us
    what hath god wrought

    Feb 2009
    Gateway to the 1000 Islands
    Sometime(s)
    3,823
    585 times
    tectin crap
    Quote Originally Posted by Ace350 View Post
    I see you are serious. That's a good idea. I may have one to add to it.
    Is there a way to use that empty battery slot to add another battery without upping the voltage? That way it will last all day without running outta juice. I forgot if its in series or parallel.

    A five pack C Nicad will power an atpro for 50 hours I am sure. But, if you want to use that slot up, put the fifth and sixth cells in parallel, and then go out series to the rest of the chain. Viola, you just added ten hours.


    Click image for larger version. 

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  12. #11
    us
    what hath god wrought

    Feb 2009
    Gateway to the 1000 Islands
    Sometime(s)
    3,823
    585 times
    tectin crap
    This is not good practice though, the cells are no longer loaded evenly. You would be better off taking five aa in series and put that battery in parallel with another battery of five more aa in series. Man, you would not use up all that juice in a whole season I bet.

    Click image for larger version. 

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  13. #12

    Apr 2012
    3
    All Types Of Treasure Hunting
    Thanks for the suggestions, all. Also, the batteries are Nimh, not nicads. Pulled the battery pack, ensured polarity with both types. Tested each side of the holder with a multimeter, 3.1v with the alkies, 2.45 with the Nimh. Tried each again in the detector, no battery indicator. Finally, tried new alkies (tested voltage), still no go. Guess it's time to call Garrett.

  14. #13
    us
    Apr 2012
    The Jersey Shore
    Ace350/ATpro/Excalibur1000/ Eldorado/BandidoII uMax/Silver Sabre uMax/Compadre/ Garrett Pro-Pointer/Lesche digger model 75/ RTG stainless Beachmaster scoop/Stealth S3i Sugarsand Scoop
    529
    148 times
    All Types Of Treasure Hunting
    Did you try to do a factory reset?
    It's on page 11 of your owners manual.
    It says to press and hold the power button for 5 to 10 seconds ( until the detector produces a fast double beep).
    One must be smarter than the equipment they are working with!

  15. #14

    Apr 2012
    3
    All Types Of Treasure Hunting
    Yes, several times. On a positive note went to the beach today and scored a $1.50 in coin

    Quote Originally Posted by Ace350 View Post
    Did you try to do a factory reset?
    It's on page 11 of your owners manual.
    It says to press and hold the power button for 5 to 10 seconds ( until the detector produces a fast double beep).

 

 

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