I own a Pismo PowerBook that I've had for over a couple of years now. As I understand it, the lithium ion battery degrades in capacity over time... so between having a 2-year-old-plus battery in my PowerBook coupled with the fact that Jaguar has crappy power management, I'm lucky if I get a full hour out of this thing before it dies. Never a good thing if you're trying to be a road warrior. Obviously, I'm going to buy a new Pismo battery. But I'm trying to figure out how to prolong the life of it, so I've been doing some research and all I get are confusing answers. So maybe you can help. 1. With a new lithium ion battery, I've read that the first thing you need to do is to fully charge it, then fully discharge it, and then fully charge it again before you actually use it. But that seems to conflict with other reports I've seen that state that fully draining a lithium ion battery actually damages its capacity. And one site says that you should fully charge then drain your battery three times when you first get it. Which is correct? 2. Is it safe to keep your PowerBook plugged in indefinately to an electrical outlet? I used to do this with mine for weeks on end, because I didn't need to move it around. But does that kill your battery's capacity over time? Or do you need to "excercise" it regularly by draining it then charging it? 3. Reportedly, the lithium ion batteries in the Pismo are immune to the "memory effect" of older type batteries. (That is, if you drain a battery 50-percent, then charge it, and do this day after day, the battery eventually "forgets" the 50-percent it never uses.) But then some folks recommend that you drain a lithium ion battery to different levels before recharging, just to be on the safe side. So are Pismo batteries immune or not to the memory effect? 4. Do you just have to bite the bullet and buy a new battery every 18 months? Are there still going to be new Pismo batteries available in 2 years? Any help is appreciated. Danke.