Explanation needed - stamina

[Akkush]

Hi !

Yes i know ,there are many threads with this... But please somebody explain me why is this ?

See pictures.

The facts:

Stamina ALWAYS ON.

Almost NO-WIFI/DATA

GSM Only.

Stock ROM. (No root,closed BL,never touched them because of warranty)

No third party apps. Nothing ,only Stock stuffs.

The nearly horizontal lines means when stamina turned on by ITSELF !

Flight/SAFE-Mode suffers from this too.

All the other times the battery drains ~1-1.5%/hrs.

When Stamina works ,sometimes a call ,an sms or anything disrupts it ,sometimes not.

And finally after many hours automatically TURNS OFF although it's swith is ON !

Service center said : everything fine ,no faulty parts. Nothing.

Tried to repair with PC Companion ,SUS,restore factory defaults ,etc. No effect. Still the same.

~3 month ago i brought home my phone from the SC with an updated FW. Maybe they broke my phone ? Because from that point Stamina doesnt work.... Is it possible ?

Summa summarum : what can i do now ???

And now ,the pics :

[Hampus]

Hi,

I'm a bit confused, what is the problem that you experience? How do you mean that the STAMINA-mode is not working?

[Akkush]

At first sorry for my poor english...

Well.

The Stamina switch is ALWAYS ON but i have constant battery drain : ~1-1.5 %/hr.

At some point(randomly) ,Stamina starting to work. Almost no drain under 10-24 hrs.

Please check the pictures !

In V4.1.2 (when i purchased the phone) it worked fine. I had ~14 days uptime.

I hope you understand me...

Forgot : FW .201 is installed. (2 weeks ago)

 An observation : .266 and .201 has the SAME SuperStamina.apk ! Byte identical. (AFAIK Sony said its improved since .266. LOL)

[Uliwooly]

I don't quite see the point, 4 days and counting on a single charge its really good 

[Akkush]

Not good. With no phone usage ?

See : Stamina on (WHEN WORKS): virtually no drain.

But doesnt work. max 5 days uptime ?

V4.1.2 : 14 days ?

Both we know ,something is definitely wrong here !

I'm not so lamer/n00b. (more than 10 years of programming ,electronics ,etc.)

With respect ,i need solution ,not calming words.

[Uliwooly]

This will help you understand how Stamina works

http://talk.sonymobile.com/t5/FAQ/Battery-time-and-enhancement-features/m-p/347874#U347874

[Uliwooly]

and this

http://talk.sonymobile.com/t5/FAQ/Facing-problems-with-abnormal-battery-and-shutdown/m-p/320375#U320...

[Akkush]

Thanks for your efforts ,but there is no new information for me.

XSP has a Li-Ion battery. It is not recommended to fully discharge as it mentioned in the link you provided.

[Uliwooly]

The STAMINA mode will constantly re-evaluate your usage and update the expected standby time accordingly.

This standby time will completely vary depending on your own personal usage. You may see that when you first start using your handset, the Standby time will be higher than what is expected after you have used the handset for a few days. This is due to STAMINA mode having no previous usage history to estimate from.

If you have a very high usage level, you may only see a slight improvement between having STAMINA enabled and disabled. STAMINA mode is more effective the more often the display is turned off as this is when the power saving features kick in. If the display is rarely turned off, you may not see much improvement in the battery performance.

[Akkush]

Ok. i will give it a shot ,but im 100% sure it is not a solution.

So i'll be back soon. Within some weeks.