Okay, I think this falls into this forum. I want to be able to extend the use of my PowerBook (2yr old) while I am traveling. Going into the settings I changed it so I could get "maximum battery life possible". But even then I do not get very long with my battery - maybe an hour or so before the laptop is done. The only app I'm running is MS Word - I have my iPod so I don't have to listen to music using the computer. I dim the monitor as much as I can stand and I turn off the noise and keyboard backlighting. Is there anything else that I can do to extend the battery life while travelling? (I'm mainly plugged in - but the occasional commute has me wanting longer battery life.) Or will I need to purchase a new battery? If I need to purchase a new battery, what are the recommendations or availability in types of batteries and where I can purchase them?