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Question about cell phones and chargers

Discussion in 'Misc Electronics' started by [email protected], May 26, 2006.

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  1. Guest

    Are there any electrical engineers or techs that can give some concrete
    guidance on the following?

    I recently bought two Sanyo MM-8300 phones through Sprint PCS to
    replace an older Sanyo SCP-4900 and Sanyo SCP-8100. One of the selling
    points for the new phones was that they would accept the same chargers
    and accessories of my older phones (New Chargers fit old phones, old
    charger fit new phones). I have also seen posts from other users that
    the 8300 uses the same chargers and accessories as a number of other
    Sanyo phones, and a number of retailers sell the generic chargers that
    will fit most recent Sanyo phones.

    I know that the older chargers I have will plug in to the phone and I
    am sure that they will charge them. However, I noticed that the travel
    charger included with my new 8300s look basically the same as my 8100
    and 4900 travel chargers (they all are the flat Sanyo plug, not the
    barrel plug), but the specs are slightly different.

    The charges have different model numbers:
    4900/8100 - Model SCP-07ADT
    8300 - Model SCP-12ADT

    The input stats are the same :
    AC 120V 60 Hz 7W

    The output stats are slightly different:
    4900/8100 - DC 5.4V 800 mA
    8300 - DC 5.2V 800mA

    This slight difference brings up a few questions:
    What effects, if any, might be likely from using an older charger with
    slightly higher voltage output?
    Will the slight difference in voltage negatively affect the phones?
    Will this only affect charging times?


    I don't have any specifications for the car chargers that I currently
    have for my older phones and can't find any specifics regarding the
    output. Are the car charger specs likely to be different, as well?

    Do you think it is safe to continue using the same car chargers I used
    for my 4900/8100?

    Thanks in advance,
    JW
     
  2. JANA

    JANA Guest

    These phones all have an internal voltage regulator and inverter. If you are
    out by a few decimal points it should be safe. What would be very critical
    in your case, is the polarity. If the polarity is wrong, the phones will be
    damaged!

    As far as the current rating for the power supplies are concerned, these
    match okay.

    --

    JANA
    _____


    Are there any electrical engineers or techs that can give some concrete
    guidance on the following?

    I recently bought two Sanyo MM-8300 phones through Sprint PCS to
    replace an older Sanyo SCP-4900 and Sanyo SCP-8100. One of the selling
    points for the new phones was that they would accept the same chargers
    and accessories of my older phones (New Chargers fit old phones, old
    charger fit new phones). I have also seen posts from other users that
    the 8300 uses the same chargers and accessories as a number of other
    Sanyo phones, and a number of retailers sell the generic chargers that
    will fit most recent Sanyo phones.

    I know that the older chargers I have will plug in to the phone and I
    am sure that they will charge them. However, I noticed that the travel
    charger included with my new 8300s look basically the same as my 8100
    and 4900 travel chargers (they all are the flat Sanyo plug, not the
    barrel plug), but the specs are slightly different.

    The charges have different model numbers:
    4900/8100 - Model SCP-07ADT
    8300 - Model SCP-12ADT

    The input stats are the same :
    AC 120V 60 Hz 7W

    The output stats are slightly different:
    4900/8100 - DC 5.4V 800 mA
    8300 - DC 5.2V 800mA

    This slight difference brings up a few questions:
    What effects, if any, might be likely from using an older charger with
    slightly higher voltage output?
    Will the slight difference in voltage negatively affect the phones?
    Will this only affect charging times?


    I don't have any specifications for the car chargers that I currently
    have for my older phones and can't find any specifics regarding the
    output. Are the car charger specs likely to be different, as well?

    Do you think it is safe to continue using the same car chargers I used
    for my 4900/8100?

    Thanks in advance,
    JW
     
  3. Guest

    Thanks for the reply JANA. That is what I hoped. The polarity is the
    same on these chargers. I appreciate the help.

    JW
     
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