Originally Posted by tsac
I have to agree with dc/dc. the Z10 is not as good as my 9810 or 9700. maybe the new OS is the issue
Not sure about it being the OS (though some versions burn through the battery like it's always running 100%), but I can get a full day out of mine if I stay away from Android apps (stay away or make sure they are closed when I am finished using them) It depends on what you use your device for at the end of the day. I have yet to see a 'best' battery or 'longest lasting batt/phone', there is always a trade off. LTE, larger screens, more open apps, everything is connected and push/polled/sync'd.