Laptop Charger won't work on another laptop

Discussion in 'Windows 7 Hardware' started by GeneralHiningII, Jan 21, 2013.

  1. GeneralHiningII

    GeneralHiningII Honorable Member

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    I've got two laptops - A Dell Vostro 3330 (something like that) and a HP Elitebook 8440p.

    I've only got one charger - the one with the Dell Laptop. This gives 19.5V (DC) with 4.62A on the 12V rails.

    The HP Elitebook can use either: 18.5V;3.5A//19V;4.74A//19.5V;3.33A

    Does this mean I can use the Dell charger with the HP laptop?
     
  2. patcooke

    patcooke Microsoft MVP
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    Anything drawing not more than the 4.62A rating of the charger should not cause a problem for the charger.
     
  3. GeneralHiningII

    GeneralHiningII Honorable Member

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    Well my charger won't work on the HP laptop. Any suggestions?
     
  4. patcooke

    patcooke Microsoft MVP
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    Are you certain that the connectors are identical dimensions and the same polarity (the latter could be dangerous if they are different).
     
  5. bassfisher6522

    bassfisher6522 Essential Member

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    No....each vendor uses propriety connections for the AC adapter. There are some after market AC adapters that have exchangeable connections (ends), which might work for you. I would only recommend using what the vendor provides.
     
  6. GeneralHiningII

    GeneralHiningII Honorable Member

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    Well I've got the other charger now and it's working.

    Still not sure what the problem was, but...

    :)
     
  7. bassfisher6522

    bassfisher6522 Essential Member

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    Glad you got it sorted.
     
  8. Digerati

    Digerati Fantastic Member
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    Future reference, you should never use a charger from one notebook on another notebook - especially from different makers. Current is not really the problem, it is the voltages that mater. And while +18.5V is very close to +19.5V, there is 38 volts "difference in potential between -19.5V and +18.5V. Since there is no industry standard for notebook power, power connections, or polarity of the connections.

    I personally think you were lucky you did not fry a power supply, or the internal regulator/charging circuits of the notebook (or notebooks). I too recommend using OEM supplied or recommended replacements - or at least seek the advice of a knowledgeable, qualified technician first.

    Huh? That makes no sense! There are no 12V rails on the 19.5VDC output of a notebook power block!
     
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  9. GeneralHiningII

    GeneralHiningII Honorable Member

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    Haha, yes I realize now how lucky I am (got caught by the guy who used the other notebook - he's better at this than I am).

    Also used to writing on a computer's PSU, so I automatically thought of 12V.
     
  10. Digerati

    Digerati Fantastic Member
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    Go buy a lottery ticket and send me your email address so I can tell you where to send 1/2 the winnings! ;)
     
  11. GeneralHiningII

    GeneralHiningII Honorable Member

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    I'm never lucky with the lottery, usually lose $30 or so each time... I'll send you half of my profit ;)
     

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