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tanmoy1199

after upgrading to 5.1.1 my Xperia Z1 often powering off by saying 0% battery despite having 80%+ charge. Is it a software bug or a hardware problem. Somebody please help.

Christofer

Hi and welcome to our community!

Try using your phone until this happens again. Then charge the phone back up to 100% without trying to power it on and see if the behaviour remains.

tanmoy1199

have tried, but unfortunately the behaviour remains the same. still powring down having charges.

tanmoy1199

by the way problem emerged when I updated to Lolipop 5.1.1

Phy

Try repairing the phone with Sony PC Companion and check if that helps
http://support.sonymobile.com/gb/tools/pc-companion/

Christofer

Like @Phy suggested, try a software repair using PC Companion.

In PC Companion you press start on "Support Zone" > Start on "Update the phone/tablet software" > "Repair phone/tablet" (the blue clickable link in the message) > Follow these steps without having your device connected to the PC.

Follow the instruction that appears in the program and do not connect your device until this guide tells you how to connect it.

The software repair will remove all data stored in the phone so don't forget to make a backup in PC Companion before you try the software repair. You can do a backup using the Backup & Restore option in PC Companion.

tanmoy1199

sorry guys I tried everything you sail but the problem remains.

tanmoy1199

if you could give me one of your email, I will provide you a graphical representation of the battery uses.
or, can you tell me way to downgrade to previous version of OS?