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Hi, I have some (quite a few, actually) old nicad batteries and ni-mh batteries that I don't know whether to recycle them or look for some other method of charging them as they won't charge up with the normal chargers. Is there any hope for batteries that won't charge up or should I just recycle them? Thanks

Posted by Darryl Traves on

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  • Darryl Traves Jun 10, 2011

    Hi, they actually are single cells, most of them D Cell 1.5v. I have heard about deep cycle chargers and a wild suggestion about freezing the batteries (which I tried without success, I didn't know how long to freeze or even if this actually works or is an old wives tale). Thanks for replying!

  • Darryl Traves Jun 10, 2011

    Hi, Do you know of a good deep cycle recharger for single cells? Or is there a way of testing for a hopeless cell/battery? Thanks.

  • Darryl Traves Jun 10, 2011

    Hi, I have sent a couple of replies. I keep getting a message saying that I have a new response but when I open the page there is nothing there. Have you only sent the one response and have you recieved the other two replies from me. Thank you for your time.

  • Darryl Traves Jun 10, 2011

    Thank you for your time and advice, it is much appreciated. I am glad that I can access such a knowledge base through FixYa.

  • Darryl Traves Jun 10, 2011

    Thank you for taking the time to reply! The advice sounds very good. Thank you for sharing your knowledge and expertise in this area, it is much appreciated.

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Jack Spooner

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To the best of my knowledge there is no cost effective way to make them useable again.I have had some fair results with my cell batteries by letting them completly discharge and then freezing them for 48-72 hours. I have been told that they aquire a memory and that by freezing them you clear that.I think your best bet is to just recycle them. Thank you and good luck.

Posted on Jun 10, 2011

  • Jack Spooner Jun 11, 2011

    I did not try to respond to you because I did not get any replies until this a.m. For dry cell batteries freezing them will help them hold a charge for extended times but will do nothing to recharge them. There is a danger in trying to recharge dry cell batteries in that they can explode if overheated. I would not recommend it.I would recycle. Thank you.

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Fred Yearian

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Usually one or more cells get damaged from discharging too far. Unless the bad cells can be replaced, the battery will not charge and recycling is usual option.

Posted on Jun 10, 2011

  • Fred Yearian Jun 10, 2011

    For single cells I would NOT attempt to charge them. The explosion risk is too high.

  • Fred Yearian Jun 11, 2011

    I received two replies... one mentioning these are single cells and the other asking if there is a conditioning charger... My reply to those two was I would NOT recommending charging cells that are old due to the explosion hazard. I have seen safety bulletins about loss of eyesight by people charging these batteries... I would not waste money on chargers that claim to restore these. Even if they charge back to a reasonable voltage, the energy content will still be low.

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