I have my freedom, but I don't have much time

I've managed to set up a Wifi network in my house, which means I can now surf the net anywhere in my little itty-bitty one-bedroom apartment. That is, until my laptop's battery runs out-which, considering that it is about two years old, takes approximately half an hour-at which point I must submit to the tyranny of the power cord. Still it's the principle that matters, and I shall live (somewhat) wire-free till such time as the radio waves from my router combine with the radiation from my cell-phone and my microwave to fry me to a crisp.