That's right folks, my new 15" pbook just arrived. I've got a quick question about battery calibration. I already installed the ram and I plugged in the power book. It's been charging for about an hour or so and the green light is already on. Is it ok to start draining it down or should I let it keep charging some more? The manual said to start draining it as soon as the light turned green but I was wondering if you guys had any different opinions/experiences. Thanks in advance and I'll be back with more comments soon.