I play games a lot and it all depends on what type of games you play which will determine how much power it consumes from your phone's battery. My best judgement is I play two games in the morning before I get ready for work - Clash of Lords and Heroes Charge. I play both for better part of the hour until I'm done completing all the dailies from both games. Let's say I start off the phone with 100%, by the time I am done, I would be left with say 90-87% give or take a few. I rarely play games for too long because I have work, and sometimes I play longer on the weekends when I'm off, but overall, I feel that the battery should last you a few hours of play time before the battery were to completely die.