Battery problem

[Triskelion]

Hi I think my battery is worn out but I just bought it last july 2013 my battery only last for about 2 hours( gaming ) and 12 hours stand by even though there is no running apps. Even if it is 100 % fully charged when I go to the power management it state that the estimated time of my battery will only last for 14 hrs ( stamina mode) how will I know if my battery is not doing well? Is there any apps that I could use? Or what should I do? Is the battery covered by the 1 year warranty of my device? Thank you

[Alexander1]

Check the following FAQ topic for some suggestions.

Otherwise I recommend that you contact your local Xperia support team for more information about the warranty for your battery and where you can turn to get it examined: 

http://www.sonymobile.com/global-en/support/contact-us/