battery life help :(

my macbook pro 15" is now 1 week old, running OSX 10.8.1

the battery is currently at 85% but only says there is 4:59 remaining

am i doing something wrong to damage the battery like this?

what tips do you all have to sort this out.

Is there a specific way to charge it? i dunno

Thanks you guys!

Mountain Lion is notorious for bad battery life; the 10.8.1 was supposed to fix it, but it didn't help for everyone. Hopefully, Apple will fix it in upcoming updates. (By the way, I am sorry but I have no actual tips for you, my macbook is running lion.)

Read this:

Testing confirms battery drop in 10.8, fix coming in 10.8.2 | MacNN