New MacBook pro 15" only 3 hours with charge, help

[JestersWorld]

I just got a new (last years model, but new in box) MacBook pro and I charged up the battery by it states that the battery charge will be gone in 3 hours or so, instead of the 7 hours that was advertisted what should I do?

 

[spinnerlys]

Have you calibrated it yet?

This should answer most, if not all, of your battery questions: Apple Notebook Battery FAQ

Apple on notebook batteries

Apple Portable: Calibrating your computer's battery for best performance

Laptop Battery Guide

 

[rmbrown09]

I just got a new (last years model, but new in box) MacBook pro and I charged up the battery by it states that the battery charge will be gone in 3 hours or so, instead of the 7 hours that was advertisted what should I do?

1. Flip to percentage left, not time
2. Did you turn up brightness, have BT, Wifi all that stuff on?
3. What are you doing with it
4. you will not get the advertised 7 hours unless you are doing basic web surfing with lower recommended brightness. 5 is more likely. I get 5 ish doing more intensive things on my 2010 MBP, and I'm supposed to get 9...