Macbook Pro 15' battery time keeps fluctuating!

[kekepanter]

The battery time on my Macbook Pro 15" goes from one time to another in a matter of minutes. I fully charged the battery after it had been drained. This is what I mean by fluctuating:

11:23am-11:28am (5m)
7h51m, 5h54m, 6h57m, 6h16m, 5h29m, 6h38m, 5h53m, 6h29m, 6h9m, 6h13m

11:29-11:34 (5m)
6h39m, 6h36m, 6h4m, 6h8m, 6h49m, 5h52m, 6h30m, 6h0m, 5h43m, 6h30m

Apple states that it should get 8-9 hours on a full charge and mine gets 6h15m. It's only 10mos old.

Any ideas would be greatly appreciated.

 

[spinnerlys]

Fluctuation is normal, as the time indicator takes into account your usage, and the CPU use is almost never constant.


Apple on notebook batteries

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

Laptop Battery Guide

Apple Notebook Battery FAQ

Replacing the Battery in your MacBook Pro



Also have a look at the following links, as the information presented there might be helpful in your future endeavours into Mac OS X and could clear up initial confusion and may even prevent harm to your system or your files.

Mac OS X Basics

Switch 101 - guide with articles made by Apple on how to accustom yourself, after you switched to Mac OS X from Windows​

Mac 101 - How to get started with Mac OS X​

Find out how - tutorial videos made by Apple on how to do certain thing in Mac OS X​

Pro tips - tips made available by Apple for easier ways of doing certain tasks​

Mac OS X Keyboard Shortcuts - Learn about common Mac OS X keyboard shortcuts.​

Mac OS X Beginner's Guide by MacRumors - learn about software, media players, shortcuts and some useful tips, tricks and hints​

Mac Guides - tutorials, product guides and more​

Mac Guides - Finding Mac Software​

MRoogle - a very effective tool to search these fora using Google and made available by edesignuk, introductory threads: 1, 2 and 3​

"How to maximise your MacRumors troubleshooting experience" created by mad jew in 2006​