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Laptop Charger Voltage

  • 13-07-2012 12:09pm
    #1
    SomethingElse
    Registered Users, Registered Users 2 Posts: 1,534 ✭✭✭


    I've just purchased a new charger for an old laptop I had lying around. The original charger is 19V, as is the replacement. However, before I connected the new charger to the laptop I decided to double check the voltage. It's reading 26.7V.

    Am I better off not connecting it to the laptop? It's too high surely? Just wanted a second opinion if anyone has any experience or thoughts about this. :confused:


Comments

  • #2
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 93,591 Mod ✭✭✭✭Capt'n Midnight


    SomethingElse wrote: »
    I've just purchased a new charger for an old laptop I had lying around. The original charger is 19V, as is the replacement. However, before I connected the new charger to the laptop I decided to double check the voltage. It's reading 26.7V.

    Am I better off not connecting it to the laptop? It's too high surely? Just wanted a second opinion if anyone has any experience or thoughts about this. :confused:
    that's the no load voltage, put a small load on it to see what it drops to

    if it don't drop to 19v don't use it

    try a 690 omh 1W resistor or two 12V bulbs in series


  • #3
    SomethingElse
    Registered Users, Registered Users 2 Posts: 1,534 ✭✭✭SomethingElse


    Capt'n Midnight wrote: »
    that's the no load voltage, put a small load on it to see what it drops to

    if it don't drop to 19v don't use it

    try a 690 omh 1W resistor or two 12V bulbs in series

    Thank you sir, I followed your instructions and the voltage did indeed drop!
    It's working away now :)


  • #4
    carbon nanotube
    Banned (with Prison Access) Posts: 994 ✭✭✭carbon nanotube


    SomethingElse wrote: »
    I've just purchased a new charger for an old laptop I had lying around. The original charger is 19V, as is the replacement. However, before I connected the new charger to the laptop I decided to double check the voltage. It's reading 26.7V.

    Am I better off not connecting it to the laptop? It's too high surely? Just wanted a second opinion if anyone has any experience or thoughts about this. :confused:


    why would a charger say that ridiculous voltage...

    tell us whats written on it.. volts, current, wattage?

    laptops need a good charger.

    incorrect voltage can lead to li-ion batterys going into thermal runaway.

    19.5v @ 12.3A, thats whats on my charger.


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