Battery issues

[Ravin28]

My experia T switches off automatically when it reaches 50% and it starts from 0% when I charge back.. Although this percentage seems to fluctuate but it never gone  below 10% before it drains out..

[Daloch]

Xperia T has a very poor battery life, but what is happening to you is not normal.

I'd tell you to reinstall the software through SUS, that's the first thing I'd do.

Let us know if it works ok after you reinstall.

If don't, then some of support team may help you.

[Uliwooly]

I agree it might be an app acting up, repair your phone with SUS or PCC and stay away from

battery apps, taskillers, task managers, antivirus, ram apps

[Uliwooly]

Update Service (SUS)

http://www.sonymobile.com/gb/tools/update-service/

http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355