Battery life

[Portofino]

I know that according to tests, xperia Z3 battery life is up to 9 hours in intensif use. On my Z3 is up to 6 hours.
I wonder if is a bug in fabrication? Help me please

[_alexdon_]

Battery life varies from user to user. There are other factors that should be included, like signal strength, other apps in use etc.