Results 1 to 4 of 4

Thread: Safe to use a higher Voltage/Amp AC adapter on notebook?

  1. #1
    zakir Guest

    Safe to use a higher Voltage/Amp AC adapter on notebook?

    Hello friends,

    My laptop adapter has been damaged.It was rated 18.5V and 3.5 AMP, 65W. I came across a replacement adapter that is 19V and 4.74A, 90W. It fits and it works, but now am scared I might be slowly degrading my laptop battery or laptop using it.Does it is safe to use like this??

    any thoughts gentle man..!!!

  2. #2
    Join Date
    Sep 2005
    Posts
    2,327

    Re: Safe to use a higher Voltage/Amp AC adapter on notebook?

    You have to look at Voltage AND Amperage. In other words, the brick should be the right voltage, and it should be putting out the right wattage total. Volts x Amps = Watts.Under powering or overpowering your notebook will harm the battery it will periodically heats up while charging... or not to charge at all. The battery might only charge with the unit off. The processor will have to work harder with this incorrect voltage and amperage.These laptop manufacturers don't randomly reach into a bin to decide what adapter you need for your laptop. There is a reason why there are so many different bricks with different voltage/amp combination's to achieve the same wattage. Each laptop has specific requirements.

  3. #3
    Join Date
    Nov 2005
    Posts
    2,496

    Re: Safe to use a higher Voltage/Amp AC adapter on notebook?

    It will obviously work since you've sufficient power to get the device to work.But the extra current demeans from your laptop will cause the adapter to get hot... really hot. Although a lot of adapters have a thermal cutout it's not wise to depend on it and a fire would really ruin your notebook.

  4. #4
    Join Date
    Nov 2005
    Posts
    2,483

    Re: Safe to use a higher Voltage/Amp AC adapter on notebook?

    It should be comfortable. The amperage and wattage rating is actually better than your original. The only thing that is out of spec is the voltage rating which is 0.5V. This is nothing considering the voltage droops when the adapter is under load. So am pretty sure that you have done a good replacement.

Similar Threads

  1. Safe voltage for Evga GTX 465
    By Oppilaa in forum Monitor & Video Cards
    Replies: 3
    Last Post: 04-06-2012, 01:02 PM
  2. Safe voltage for i7-930?
    By jUST-aLEXIS in forum Overclocking & Computer Modification
    Replies: 1
    Last Post: 16-09-2010, 05:47 AM
  3. what is the Safe voltage for intel i7-930
    By Tajdar7 in forum Overclocking & Computer Modification
    Replies: 3
    Last Post: 15-09-2010, 12:24 PM
  4. How to flash GTX 480 BIOS to allow higher 1.21v voltage adjustment
    By Gillian Anderson in forum Monitor & Video Cards
    Replies: 6
    Last Post: 21-07-2010, 05:53 AM
  5. Memory Need Higher Voltage
    By Walby in forum Motherboard Processor & RAM
    Replies: 3
    Last Post: 05-01-2009, 07:01 PM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Page generated in 1,711,665,730.20000 seconds with 17 queries