1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

If something is rated at 2 Amp, what does that mean?

paul_r Nov 1, 2011

  1. paul_r

    paul_r Member

    172
    0
    16
    My car sat nav is rated at 1A. I have a usb adaptor to put in my car fag lighter which is rated at 2A. Is that 2A the output of the USB, or is the 2A the maximum that can be drawn through the USB by the Sat Nav.
     
  2. Kaibo

    Kaibo Member

    358
    14
    16
    The sat nav will draw a current (I should imagine this is a maximum rating) of 1 amp, the usb can supply a current of 2 amps, basically you could safely run 2 sat navs, this is still only a fifth of the sockets actual power.

    Kai
     
  3. paul_r

    paul_r Member

    172
    0
    16
    As oposed to voltage. If you supply a higher voltage, this kills the device. It doesn't "draw" only the voltage required.
     
  4. Kaibo

    Kaibo Member

    358
    14
    16
    Well to give you an example, my dads road was supplied with 400v this week and it killed everything switched on, tv, laptop and central heating to name a few. I honestly don't know the science behind this though :)
     
  5. paul_r

    paul_r Member

    172
    0
    16
    Thanks.
     

Share This Page