Just read the review in Taiwanese forum, mobile01. I notice the settings has black background too, which means is older version. The following is the battery test and the translation.

◆螢幕開全亮、Wi-Fi 連結看YouTube、BRAVIA Engine 2及音效調整關掉：5小時22分。
◆螢幕開全亮、Wi-Fi 連結看YouTube、BRAVIA Engine 2及音效調整打開：5小時。
◆螢幕開50%、用MX Player看1080p mkv影片、Wi-Fi也有連線待命、BRAVIA Engine 2及音效調整打開：約4.4小時。
◆螢幕開50%、看千尋影視、Wi-Fi 連線下載、BRAVIA Engine 2及音效調整打開：約6.8小時。

-Full brigtness, wifi connected and youtubing, BE 2 and Sound effect OFF, 5 hrs 22 mins
-Full brigtness, wifi connected and youtubing, BE 2 and Sound effect ON, 5 hrs
-Bightness 50%, MX player played 1080p MKV, Wifi connected as standby, BE 2 and Sound effect ON, 4.4 hrs
-Bightness 50%, Streaming video with apps, Wifi connected and streaming, BE2 and Sound effect ON, 6.8 hrs.

http://www.mobile01.com/newsdetail.php?id=13734

Looking at u guys with the phone makes me jealous and more envy at that phone.. will definitely purchase XZU when the LTE version comes to replace my old but still mighty 4 years old android phone A leap from 4" to 6.44".. Love big phones What makes me in dilemma now is the colour.. white or black One question to u guys is it complicated to root Sony phone? As I am only familiar with rooting only Samsung n old HTC phone..

Sony copy what samsung did for s4, trolling user to the max,

Once lte version is out, price of non lte will drop expected rm300-500 lol

which phones in 2009 has 4" screen? quite impress you can use it for that long and bear with it.

I wonder how does the battery perform when using 3g@h..

dont worry Sony and Asus have good reputation for being fast, open and helpful...

especially from CynogenMod group, a bunch of them (elite member) jump ship from samsung to sony

This Friday u can see all the price at garage sale....but if i not mistaken only those Sony store will bundle the battery bank....with it...

Those who wants to wait for lte version of Xperia z ultra better dont go and test this sexy phone. If not u will surely end up buying it like me if u have enough budget. Is too good the screen and the speed and the built quality of this phone is the best I have seen at the moment. Is so light to hold in hands also compare to note 2

Nice to know those modding devs support Sony now. Sony has been great to users, even announcing 4.3 support for their latest devices.

Supposedly, only pre-orders receive the battery bank.

Stamina mode is like deep sleep app whereby it stops the related apps?

Yeah, later might sell off my xz and go for xzu lol

You have a XZ and you are asking me this question ???

With Sony’s Battery STAMINA Mode, you can extend the standby time of your Xperia by more than four times. With Battery STAMINA Mode turned on, the background activities of most applications are reduced when you turn off the screen.

Battery life is a very important factor for many consumers, and this is something Sony has been working hard to improve. A lot of the battery power on a smartphone or tablet is consumed by background activities in apps and games when the device is not in use. Now with the new Battery STAMINA Mode enabled, apps are not allowed to synchronise and check for notifications and incoming messages when the screen is off, something that normally consumes quite a lot of power while your phone is resting in your pocket.

Starting one minute after the screen has been turned off, data traffic is automatically blocked and background activities are prevented from waking up the system. And then when you turn on the screen, the activities will resume again instantly. And as the IP address for your phone is kept, you will immediately have network access. This all makes it possible to bring you notifications when you need them and have time to look at the screen, and not while the phone is tucked away.
When Battery STAMINA Mode is on, you will still receive phone calls, SMS text messages and MMS notifications at all times. The preinstalled Calendar app and Alarm notifications will also work as normal, while the LED will only illuminate to indicate low battery.

I have used so many other Androids ( HTC, Samsung, Dell, Asus , Nexus etc ) - ONLY Sony's built in power management works perfectly.

This post has been edited by benny888: Jul 30 2013, 09:40 PM

my mistake.. supposed to be 3 years old.. Samsung Galaxy S.. still runnning fine with JB 4.2.2 n hopefully 4.3 in the future.. was about to upgrade to S3 but the design is not "there" for me.. n S4 looks much more similar.. just like uncle Benny after seeing Note One on 5.3" makes me envy big phones.. less then 5" feels like it is too small for me.. actually was patiently waiting for Note 3 with LTE then come this beauty XZU.. never looked back since

Good to use a phone up to few years, totally worth it. S3 and S4 really let me down as im S2 owner...

s3 i use few months....s4 i use few days... no plan for samsung already...note 3? not so keen like last time at note2 already.... sony is my new choice now. and i found out recently sony update also quiet fast already compare to last time...big improvement .

Only pre order can get battery bank??

Cant wait for this beast to be in my hands...now need to shop around for the best price...

Yeah! Happily own it. :-)

Awaiting 1st August release date hopefully this time Sony Malaysia provide good bundle else i'll just get the phone unit itself from Satu Gadget Dot Com for 2099

I would love to use Cynogenmod on this beast