On my recent trip, I toted a Lenovo ThinkPad X40, and for tasks such as writing and e-mail, I typically can get about 2.5 hours of life out of it on its battery. (It helps a lot to turn the brightness down and set standby mode to kick in whenever the machine hasn???t been used for 5 minutes.) Using the Electrovaya PowerPad 130, I was able to use my laptop outside for nearly nine hours, with only a