Alienware X51 R2 PSU on Alienware 13 Laptop

Hi guys,

I'm upgrading the PSU on my X51 R2 to the 330W, and what I want to know is can I use the 240W on my AW 13 Laptop.

As I play a session or two over lunch at the office, but I have to carry the PSU with me to the office everyday, so if it works I can leave one at home, and one at the office.