Sometimes you want to buy a lap top so you can carry it around and make easier for you to use it. But that is not so most of the times.
Laptops tend to get heavier as you carry them around. You know that some pounds at the beginning of your travel become like a ton after some days carrying that little monster.
A tip that I give is to carry your laptop without its battery. That is it!

A battery is no use anyways. Because it lasts only for two or three hours. Every place you go you find electrical power. So no need to overload yourself.
Don’t bother to spend your money buying new batteries. They have no use. But if you decide to buy one, don't forget to see the eBay. People seel batteries for good price there.
Believe me.