Share your experience!
Do this at your own risk. I'm not liable for any damage.
1. First You go Settings--->APPS--->All Tab---->ECO Mode Controller/ Extended battery mode (Click Clear Data and Force Stop)
2. Then Again you Go Settings--->APPS--->All Tab---Setting.apk (Click Clear Data and Force Stop)
3. Charge Your Mobile 4 to 5Hours
4. After 4-5 Hours While Charging That Time You Click Vol Up+Power Button( after 3 times Vibrate)
5. Remove Your Charger and Again Plugin Your Mobile The Sony Logo With Comes And Charging Logo has been Shown
6. Then Power On Your Mobile While Charging
7. Then Go Setting--->Power Management TURN ON BATTERY STAMINA MODE
8. See The Screen Shots
It will not make any damage hopefilly.
If this problem persists, i suggest u to root your phone & then install custom roms from xda developers which are ultra fast,smooth & battery saving
May b follow this steps if u don't want custom roms :
1st you need to root the phone first. Follow any root method or follow this
link http://techbeasts.com/2013/07/17/one-click-root-method-for-sony-xperia-devicesxperia-z-zlsp-more-gui...
2nd..Again important thing...!!! ( DO NOT DOWNLOAD ANY BATTERY SAVING APPS )..Examples are ( GO power, Juice Defender which for me, DU Battery saver...!!! )
3rd...Keep the Stamina MOD on..!!
4th..Download Better Battery Stats...for your guidance...!!
5th Make your screen brightness to 0...( Select Adapt to light conditions )...Trust me making brightness to 0 will still help you to see anything on the mobile even in the sun..I've tried it..
6th Download Greenify for Hibernating apps....which will not eat your battery allot
7th Download Startup manager...For stopping all the apps that start when you boot the phone..
8th Don't keep any launchers ( Next Launcher, Go Launcher, Nova launcher or any other launcher except for the Xperia Home..)
9th On the homescreen, put the apps only on 1 page...!!
10th Don't use any Live wallpaper or anything news or weather widget...!!