07-09-2013 02:44 PM
Welcome to BlackBerry Support Forums
Are your sure your Battery is good enough ? You can try another good fully charged BlackBerry Battery and test it on your device , it will reveal if the problem is within your Battery or device itself .
Or Have you recently installed any application before this Problem started ? Think carefully any theme , wallpaper any games !
If you have then try to boot your device on Safe Mode , On Safe Mode delete any application which you think might be responsible for this issue , from Options > Device > Application Manegement > locate and delete any newly installed 3rd party application , it might help in resolving your issue :
KB17877 : How to start a BlackBerry smartphone in Safe Mode
KB10040 :How to view or remove installed application on a blackberry smartphone