At least once a month you should run it on battery power to exercise the battery. Cycle it to about 40% left then recharge. Do not cycle it to a near zero charge.
Tips to help you extend your battery life.
For localization of your Mac contact your local Apple Store or Apple Authorized Service Provider.
Genius reservation http://www.apple.com/retail/geniusbar/ .
or find an Apple Authorized Service Provider https://locate.apple.com/country