Unreliability of laptop computers

Angelo Fraietta angelo_f at bigpond.com
Wed Nov 6 21:47:00 UTC 2002

Joel Sherrill wrote:

>Angelo Fraietta wrote:
>>I am looking for a reference (I can't remember where I read it) that
>>laptop computers (running Windows, MacOS, etc..) are not designed to be
>>left on for days. I am looking for a justification for using an RTEMS in
>>an embedded system instead of running a program on a laptop computer for
>>Can anyone help me out on this one, does anyone know of a reference I
>>can use?
>I don't have a reference but I can point out a few issues:
>  + usually more fragile than hardened 
>  + heat dissipation is often poor
>  + if the battery is being viewed as a free UPS, then they are
>    likely mistaken.  My experience is that leaving a laptop on
>    with the battery always in will kill the battery within
>    12-18 months.  
>  + Probably more expensive and larger than a custom configured
>    PC-104 system.
>I wish I had a reference.
I have a reference in the paper I read last year, stating the fragile 
nature. It was a URL and I have it saved, but the URL is no longer 
available. I can still use it as a primary source because I have the 
dates cited and have a copy of the whole document.

If you want to include it as a secondary reference, you can cite
Fraietta, Angelo. "Smart Budgeting for a Smart Controller." Paper 
presented at the Australasian Computer Music Conference, University of 
Western Sydney 2001.

Available from

Additionaly, it will be available again in my doctoral thesis (when it 
is finished next year).

Angelo Fraietta

PO Box 859
Hamilton NSW 2303

Home Page


There are those who seek knowledge for the sake of knowledge - that is CURIOSITY
There are those who seek knowledge to be known by others - that is VANITY
There are those who seek knowledge in order to serve - that is LOVE
    Bernard of Clairvaux (1090 - 1153)

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