As the title, I'm looking for an ultra-portable PC laptop.
12" or 13" Screen, should not weigh more than 1.5Kg with a decent battery life. Also needs to have a serial port built in if possible. Does not need to be very powerful as it will only be running some basic networking tools, although a good amount of RAM would be nice
Optical drives are nice, but not a requirement.
My budget is £400-500, so obviously I am looking probably at the second hand market, but I'm not that bothered by this as it is not going to be my main machine, just need something small and lightweight that I can carry around with my MBP to run some propriatiary software without having to use Bootcamp.
So far on the acution sites I have come across a lot of Thinkpad X31's that look like they would do what I want. Does anybody have any suggestions for other makes/models to be looking at? Or if indeed I might be able to get a brand new laptop for a little bit more that would meet my requirements?
12" or 13" Screen, should not weigh more than 1.5Kg with a decent battery life. Also needs to have a serial port built in if possible. Does not need to be very powerful as it will only be running some basic networking tools, although a good amount of RAM would be nice

Optical drives are nice, but not a requirement.
My budget is £400-500, so obviously I am looking probably at the second hand market, but I'm not that bothered by this as it is not going to be my main machine, just need something small and lightweight that I can carry around with my MBP to run some propriatiary software without having to use Bootcamp.
So far on the acution sites I have come across a lot of Thinkpad X31's that look like they would do what I want. Does anybody have any suggestions for other makes/models to be looking at? Or if indeed I might be able to get a brand new laptop for a little bit more that would meet my requirements?