A reader wrote in suggesting the MacTruck as an alternative to QuickerTek's Powerbook handle. While the MacTruck looks like the invincible case for a Powerbook, it doesn't solve the problem that I have. I like to wander around in conferences, and being a small guy, I don't like toting a lot of stuff around with me. If Powerbooks had battery lifespans comparable to Centrinos, I could just carry the laptop for most of a conference. As it is, I minimally need to carry the Powerbook, the charger, and a spare battery, which is really too much. Since the MacTruck weighs in at 2.4kg (about 5lbs), it weighs as much as the Powerbook does, it's clearly way too much.