I've been needing a new battery for my Powerbook G4 for a while now, but I've been doing some thinking and now I'm not sure. My battery has a bizarre way of discharging. Depending on what I'm doing (and maybe the weather?) it will last as long as an hour or as short as 5 min. No joke. If I'm just surfing the web, i can get a decent life out of it sometimes, but as soon as I do something that kicks the processor into gear, its all over. If i try and watch a youtube or other online video the battery will drop to "0%" and go into sleep mode. I can be at 89% capacity, turn on a youtube video and the computer will be dead in a minute. This has me wondering. Does this sound like a battery problem, or could it be a power problem with the Powerbook itself? If its the Powerbook, I don't want to waste $70 on a battery that is no good to me. Let me know what you guys think. Its an original 867MHz Powerbook G4 12.