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Adaptor for Laptop...

Discussion in 'General Electronics Discussion' started by placemat, May 19, 2017.

  1. placemat

    placemat

    1
    0
    May 19, 2017
    Hello, I've been kindly given a laptop which I reinstall and give away. Unfortunately there is no PSU with it. The input on the back of the laptop says 19v = 4.74A. I have found a PSU on the net but it says 19v 3.42A.
    Will this PSU be OK to power the laptop?
    Many thanks,
    Steve.
     
  2. davenn

    davenn Moderator

    13,343
    1,774
    Sep 5, 2009
    it will probably be struggling to supply the lappy and will run very hot
    get one with the same or higher current capability
     
  3. liamlogan

    liamlogan

    2
    0
    May 21, 2017
    Apply simple funda
    I=v/r
    Think how 3.42A will equal to the 4.74A?
     
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