Okay, this is probably your normal battery posting... or not. Anyways, So I noticed that on average use, I can get about 3 hours out of the system, which is normal for me because I have the screen brightness at 100% and keyboard lighting on whenever available. Wi-Fi is also on, and sometimes I'll be running flash or vm's. However, Last week, I brought my system to school just to take notes during review for a Final. I had a full battery charge, turned off Wi-Fi so I don't surf on Facebook and such, had minimum brightness, no speakers, and keyboard lighting off. The dual graphics card was set to Intel only. I had to pull out the charger and plug the system in after the 2nd break, which was 3 hours into the 4 hour review. I was hoping to survive through the entire lecture on one charge, especially since I tried every method I can think of to conserve energy and I still got the same time out of it. I do calibrate my battery, last calibration was done 2 weeks ago. My cycles shows at 150, health is at 90%. According to CoconutBattery, the laptop is 20 weeks old, which is about right. I'm still within my 90 day telephone service. The only thing is, I'm using a 85 watt battery charger from my old 17" Core Duo and not the charger that came with this system. Has the charger been advanced in which, I might damage a battery using a different (older) charger? (because the health is actually dropping. It arrived with 102%, then slowing dropping over time) I don't know, it seems like somethings wrong if I can't really conserve battery time when I need it here. Any opinions? thoughts?