Do Voltmeters check battery life of D-Size (Torch) batts?

Discussion in 'General Off-Topic Chat' started by xDahlia, Aug 25, 2008.

  1. xDahlia
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    Newcomer xDahlia Advanced Member

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    Doing this for a school experiment thingy..
     
  2. .::5pYd3r::.

    Member .::5pYd3r::. Viva La Pizza

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    No. I don't think so.
     
  3. xDahlia
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    Newcomer xDahlia Advanced Member

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    =\ Sure?..

    EDIT: Waiting for more replies, can't trust 5pyd3r for all I know.. [​IMG]
     
  4. enarky

    Member enarky GBAtemp Advanced Fan

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    Short: nope, they don't.

    Long: If you know how the battery discharges (in German we say "Entladekurve", IIRC... look for something like a "discharge diagramm") you can make an educated guess on how much capacity is left in the Battery if you know its charge, measured by a Voltmeter. This works better for NiCd Akkus, not so good for NiMH types and even less for Lithium-Ion batteries (all IIRC, of course). If you dig a little deeper you might find out that most battery charge displays in electronic devices work like that, they're inaccurate at best and useless in the worst case.
     
  5. xDahlia
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    Newcomer xDahlia Advanced Member

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    Meh. Okay, one more question though. Is there any other way to test the life of the D-Size batteries? >_> Or do I have to wait around for it's life to die. >
     
  6. enarky

    Member enarky GBAtemp Advanced Fan

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    What exactly do you want to do with it? If it's for a school project I assume you must have gotten *some* instructions on what to do, don't you?

    If all you want to find out is if there is *some* charge left in the device you can of course use a Voltmeter - this doesn't tell you anything about quantity, though. D-Size batteries should be somewhere in the region of 1-1.2 V for rechargeable batteries and somewhere around 1.2-1.5 V for single use batteries (alkaline/zinc carbon). If it's much lower than that you can assume that the battery is dead.
     
  7. kobykaan

    Member kobykaan GBAtemp Addict

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    Yeah you can ... you can check virtually any kinda battery within reason so long as your meter can handle it [​IMG]
     

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