The accu of my MACBook Air goes down half the time as before I installed the new Mountain Lion OS. Any help or suggestions?

After installiong the OS Mountain Lion the power of my Apple Airbook (2012) went down twice faster than before. Does anybody knows why?
As well I lost my backup HD. After installation of Mountain Lion the HD was not anymore available!
Any solution?
Rgs Thomas

It is likely not working from the same coffee spill. You can use Apple's hardware tests to see if any errors show up on sensors (voltage or current sensors) that might indicate the problem (see here for info on the tests: http://reviews.cnet.com/8301-13727_7-57352461-263/how-to-invoke-and-interpret-th e-apple-hardware-tests/). While you can try using dionized water to gently wash the port and spray it out (open the system to do this from the inside), it's not a guaranteed fix and could potentially harm other aspects of the system; however, since you recovered it from a similar spill and got it cheaply it may be worth a shot.

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