Hi there, I have 1 iMac, 2 Macbook at home, using a wireless network (belkin router) The weird thing is, my iMac has no problem to connect to the internet at all. And one of my Macbook has no problem at all. But, the other Macbook of mine, I need to connect it with the power adaptor, if I want to get online. If I'm adaptor-less, I just kept disconnected automatically (internet), every 5 minutes. the Macbook model is 1.83ghz Intel Core Duo. I hope someone can help me with this please. Thanks in advanced.