(Q) Battery life?? topic

Guys, I'm thinking about buying a Xperia ZQ (other version of the ZL), and first I have to know about its battery endurance, since I wouldn't be able to charge it everyday. If someone can answer, I would appreciate:

What do you think about its battery? How much do you usually get from it? A full day? And with YouTube? And what about with games?

Any other hints about it, please, comment.

Thanks.