OS Mountain Lion 10.8.2 1-Hour Battery

I recently updated to ML 10.8.2 from Snow Leopard on my 15" Late 2011 Macbook Pro, and twice now, it's done this thing where I open it up after it's been in sleep mode and the battery drains in about an hour, or an hour and a half. I've just been sitting here with a pages document, keynote, and firefox open, and it was at 50% in 30 minutes. That's NEVER how it normally acts. How do I fix this, this is ridiculous.

All that suggests you have a runaway background process. These are often traced to three things:
1) Running commercial anti-virus/internet security software. If you have it, dump it.
2) Third-party backup software that comes with many name-brand external hard drives. All most users need is Time Machine.
3) unsupported browser extensions or plug-ins.
Yo can get a look at what processes are running. Here are the steps:
1) Use the computer normally for several hours.
2) Without restarting the computer, quit any applications you have opened,
3) In Applications > Utilities find and launch Activity Monitor.
4) If you have never used AM, you'll need to change one setting. There is a "Show" option with pull-down in the top of the AM window, like this:
It's default is "My Processes." Change to "All Processes" and shown.
5) Highlight the "%CPU" column to sort by processor useage.
Watch the list for a few minutes (it changes as processes compete for resources). If you've quit apps you opened, no single process should take more than about 5 percent of the processes. If you see one or more taking over 10 percent, you probably found the cause of your overheating and short battery life.

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