1% battery problem

[Gedrovits]

Greetings, I bought this phone 4 months ago, and about a month ago strange problem began.

I am charging the phone like usual, until 100%, but then if I run some application (random one) for about 20-40 minutes, my battery level drops down to 1% and stays there.

After this phone can be used for 10 - 15 hours, without a problem (not in standby mode).

Until it really drops below 1% and shut downs.

No battery applications were installed. Phone is not rooted or customly modified.

It's base configuration + SD card.

I tried reinstalling software with the Sony Update Service (x2)

Tried resetting the software settings (x5)

I want a solution for this, because it's hard to prognose how long phone will survive (it's real battery level)

This is some example charts of battery usage:

[Uliwooly]

have you disabled any app? try again but this time turn off your wifi, I see that it was active the whole time.

[Gedrovits]

Yeah, I see your point, but this is not related.

Problem is battery goes down from 100 to 1 in matter of minutes, BUT then it goes on normally for hours of usage. So basically something wrong with correct battery asseesment. It shows 1%, but in reality it's normal value and goes on for it's normal 6.5 - 8 hours of active work.

[Uliwooly]

you should take it to a Sony repair center

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

[Xperiawesome]

Try updating your phone.

[Gedrovits]

I've on purpose never done restart, 10 days with 1%, with correct charging sessions and usage.

To be honest, I don't want give it back to local shop, cause all their expertise and stuff takes very long time, and I can't just be without smartphone all this time.

Btw also screen strangely flickers sometimes, then I view some application, for example LinkedIn, it kind of not good for the eye.

So what can I do? Turn it down to local store where bought it and wait for the 'repairs' or contact Sony support for solution of this software bug?