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Thread: Help with tool batterys

  1. #1

    Default Help with tool batterys

    Like a dummy i did not seperate my new batterys there the ryobi 18 volt batterys. Is there a fast way to see which batterys are in the best shape?
    LED's have gotten too bright in our stuff. Many nights I'm awakened by my modem lights blinking.had help with my sig thank you for your help.

  2. #2
    *Flashaholic* Lynx_Arc's Avatar
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    Default Re: Help with tool batterys

    Quote Originally Posted by raggie33 View Post
    Like a dummy i did not seperate my new batterys there the ryobi 18 volt batterys. Is there a fast way to see which batterys are in the best shape?
    Not sure what you mean by that... are you talking about charged fully or not or capacity overall?
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    Default Re: Help with tool batterys

    Iím guessing that you canít tell the old from the new.
    most tool batteries have serial numbers on them. You should at least be able to
    figure the production order by the numerical sequence.
    Thanks donít know of any way to actually ch cl capacity without taking them apart.
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    Default Re: Help with tool batterys

    I would assume you bought a new battery pack because the older one was not at a very good level of holding capacity any more. I think it should show very quickly which is which. But I really don't know your whole story about your batteries.

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    *Flashaholic* Lynx_Arc's Avatar
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    Default Re: Help with tool batterys

    Quote Originally Posted by jabe1 View Post
    Iím guessing that you canít tell the old from the new.
    most tool batteries have serial numbers on them. You should at least be able to
    figure the production order by the numerical sequence.
    Thanks donít know of any way to actually ch cl capacity without taking them apart.
    Some brands date stamp them also, that is date of manufacturing but that isn't necessarily a way to know for sure.
    One way to estimate capacity is to use a tool that isn't a heavy drain like a flashlight and time how long it takes to go out and if you can find information about the current draw of the light you can estimate the capacity used.
    Often though a very heavy current draw use tool can separate weak batteries quickly as you will notice you get 30 minutes on a good battery and a bad one about 12 minutes before it shuts off. It also may be that batteries can develop higher internal resistance while under heavy loads gets poor runtime but lighter loads seems more "normal" in use. Date stamps may yield info about newly bought batteries but on older ones they could be just about as good or worn out.
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  6. #6

    Default Re: Help with tool batterys

    Assuming that there is no way to tell the old from new by looking at them (same markings and no scuffs or scratches on the old ones), you can charge them all up and check their Voltages after charging and after a week or so to compare self discharge.

  7. #7
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    Default Re: Help with tool batterys

    Quote Originally Posted by xxo View Post
    Assuming that there is no way to tell the old from new by looking at them (same markings and no scuffs or scratches on the old ones), you can charge them all up and check their Voltages after charging and after a week or so to compare self discharge.
    That may work but there may be varying voltages enough that it may take longer to notice any discernible difference.
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  8. #8

    Default Re: Help with tool batterys

    I am trying to figure out which batterys are in the best shape. I had no issues with the older batterys. I just bought more becuase they was pretty much free with the tool. Whats crazy is to buy the batterys alone it cost more then the batterys and tool lol its crazy
    LED's have gotten too bright in our stuff. Many nights I'm awakened by my modem lights blinking.had help with my sig thank you for your help.

  9. #9

    Default Re: Help with tool batterys

    You can also load test them with a resistor and a multimeter.

  10. #10
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    Default Re: Help with tool batterys

    Quote Originally Posted by xxo View Post
    You can also load test them with a resistor and a multimeter.
    Or put a heavy drain power tool on them and run them till they quit off a fresh charge and compare the times.
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