Share your experience!
Dear Sony team
I would like to take this opportunity and wona say thanks for making such a nice device.
What I like most is the battery life it gives me I can easily get thrue Al most 3 days in normal usage...
In last word thank you thank you thank you very much....
Thanks for the feedback and glad to hear that you like your T2 Ultra and the battery performance 
not only me but all the people all around me
Yes T2 Ultra battery life in unbelievable. 3 days backup with normal usage is easy to get with this phone.
But Z1 battery life is also great. My wife has Z1 and she is able to get 2 days of usage without any fuss. I think your friend should upgrade to latest KitKat update to get excellent battery life from Z1. prior to KitKat update Z1 battery was not that great. Also ask your friend to swtich on Stamina Mode.
But without doubt Z1 will not be able to achieve battery life of T2 Ultra which is unbelievable. In fact I think Sony marketing startegy for T2 Ultra has not been good
Could you please look into this matter
Its been long time and I am still having buggy stamina mod.
I usually charge my phone after 2 or 3 days
Now what happens is stamina mod never update it's states until or unless I restart the devise
My screen shot after recharge
Its still on previous states
To change I have to stop echo mode and restart the devise
Please please please fix this
For customer's sake
After force stop echo mod and restart device
Screen shot
Today again
This is because STAMINA learns how much you use the phone. See my reply here for more information: http://talk.sonymobile.com/t5/Xperia-Z1-Z1s/STAMINA-MODE-here-we-go-again-final-clear-up/m-p/471951#...
When you force stop and clear data for the app you're not making the battery last longer. You just clear your usage stats so that the phone can't estimate how long a charge will probably last based on your usage.