Stamina mode flaw causing overheat, battery drain issues!

[jonster]

After a week of experimenting, I have come to the conclusion that there may be a software error with stamina mode on my Xperia SP. I experienced overheating and battery drain issues with stamina mode active as opposed to normal phone operation with it off.

The problem is that with stamina mode on, the cpu cores run at a constant 70-100% even on standby. This causes the phone to overheat and the battery to be consumed in less that 6 hours.

I have links to screenshots to prove my assumptions.

Here are pics with stamina mode on: (copy and paste them to your browser)

https://www.dropbox.com/s/d41undug59r0bzc/Screenshot_2014-01-03-11-12-44.png

https://www.dropbox.com/s/9wzt1dhruxwgh84/Screenshot_2014-01-03-11-13-01.png

Note the high cpu core usage and battery temp values while on standby.

Here are pics when stamina mode is off:

https://www.dropbox.com/s/5a6lda1g0a6gz54/Screenshot_2014-01-03-11-14-35.png

https://www.dropbox.com/s/67ymjpb70i1rtrp/Screenshot_2014-01-03-12-11-18.png

These should be the normal values during standby.

Sony should take a look at this problem and fix it with the next OS update. People who are experiencing the same issues should try disabling stamina mode and see if it helps. It works for me and I had this phone only a week.

[LongShadow]

Hello all!

Sorry for my request.

I bought my SXSP 2 weeks ago. And i found that my battery drains very fast.

If i'll go to Settings -> Power management then estimated standby time with STAMINA is my battery percents.

For example if i have 100% then my time is 4 days 4 hours.

And 1 hour = 1%. So if i'll go to sleep and when i'll wake up my battery will have 92%. It means that 8% drained per night.

BUT! If i'll activate flight mode my battery will drain as well as without it.

I have the last firmware. All data such as GPS, WiFi or Bluetooth are disable.

Can you help me? Or i must go to Sony Centre and change the battery?

Thanks

[Uliwooly]

have you excluded any app on STAMINA Mode? if you have and that app requires to be connected or syncing then it defeat the purpose of STAMINA Mode.

also stay away from this apps

taskillers

antivirus

ram apps

battery apps

booster apps

if you have them, uninstall them.

also post screenshots of your battery list and the graph

settings > power management > battery

[LongShadow]

For purity of experiment i deleted all my apps and now i have clear firmware like in the shop.

It's my screenshots

[Uliwooly]

so it was an app acting up, for future reference you could repair your phone

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

Don't forget to mark the Correct Answers & Helpful Answers

[LongShadow]

I'm sorry, but i said "For example if i have 100% then my time is 4 days 4 hours"

But now i ask 2 people about this stats and the first said that his time is 7 days 11 hours. And the second said that 9 days and 5 hours. Why my stats so bad?

And i want say that any app which can do some actions when screen off ISN'T a problem. 2 days ago i saw this graphs and "Awake" = "Screen on", but battery drained too

[Uliwooly]

there's nothing wrong with your phone, other people might have their data, gps off and they hardly use their phone; but this should explain it

http://talk.sonymobile.com/thread/127317

STAMINA mode explained

[LongShadow]

I don't know about it. Thanks.

But how explain my stats. 4 days 4 hours = 100%. And every hour my percent decrese by 1.

Somebody says that at night his battery drains 2-3% or NOTHING, but mine at least 8.

In flight mode also 8-10%. I think that my battery is defective. Can i change it in Sony centre if my phone was bought 2 weeks ago?

[Uliwooly]

most likely you have apps that keep your phone awake, if you have facebook syncing how ofte do you sync? how often do you sync gmail, email, whatsapp? etc

[LongShadow]

No. I made hard reset and my phone now like in the shop. I don't use facebook, gmail, etc... sync if off