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Charger wont recharge dead batteries, says "fully charged"

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  • perxbvq Jul 26, 2009

    thanks.

    batteries are 14.4V

    they have four contact blades

    crossing the two blades perpendicular to the long axis of the battery = 13V

    """"""""""""""""""""other blades (parallel to) """""""""""" =13V



    when inserted in the charger, only the middle of the three lights lights = "fullly charged"



    I discharged manually the pair of "other" blades to 3-6V and reinserted the battery and it still says "fully charged"



    the whole deal is about two years old, but has been used only occasionally. In fact I dont think I ever found it necesssary to recharge the batteries before now... they are ni-cads

    thanks for your help

    paul

  • perxbvq Jul 27, 2009

    thanks for your help-

    it remains a constant in my life that just having someone else helping you with a problem results in a solution - and it has happened again for which I thank you very much and will rate you 100%!



    here is what happened: I was multi tasking- hence the slowness of my responses to your suggestions.



    even though only the yellow "fully charge" light was on, I had just left one of the batteries in the charger. After your most recent message and an interval of about an hour, I went back tp the charger and pulled the battery out, and damm but the battery was nice and warm!

    AND IT WAS CHARGED AND RAN THE DRILL WITH GOOD POWER!!!!



    so I stuck the second battery into the charger and noticed theyellow "fully charged" light blinked and the red light "charging" blinked ON! but then the red light went out and yellow light came back on. so I rotated the battery in a grinding motion on the transformer as much as the slack in the charger plug would let me- and found I could get the lights to do that again- red on yellow off--- yellow on red off.... SO i FOUND A POSITION WHERE THE RED WAS ON AND THE YELLOW OFF AND CHARGED THE SECOND BATTERY WELL TOO! SO THE PROBLEM IS CURED AND I THANK YOU FOR HELP! paul





  • perxbvq Jul 27, 2009

    its fixed !
    thanks a lot
    good deal

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Do you have a multimeter by chance?

Posted on Jul 26, 2009

  • 3 more comments 
  • Mike Butler
    Mike Butler Jul 26, 2009

    How old are batteries & charger?

  • Mike Butler
    Mike Butler Jul 26, 2009

    Anybody there?

  • Mike Butler
    Mike Butler Jul 26, 2009

    Do same (DC voltmeter) across charger tabs, where battery makes contact, with charger on, and see what readings you get there and get back to me.

  • Mike Butler
    Mike Butler Jul 26, 2009

    Please help me out with a rating when your satisfied. Thanks.

  • Mike Butler
    Mike Butler Jul 27, 2009

    Great ! glad to hear it Paul & thanks for reply. If you could check off fix for rating, we'll all be good.
    Thanks again. Happy Cutting.


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