Kinda hate it to have a short battery life. I always play games when I'm going to school or anywhere and then you only have less than 50% battery but you just charged it to 100%.
That's the only thing that I do not like about playing games on my mobile device is that you are only limited to the amount of power that you have in your battery and this is something that limits the amount of game time that you are able to have. I still like playing on my phone though but it is not something that I do for too long. Now to counter the battery thing I have bought a battery pack that is portable and that I can move anywhere.
I know what you mean and it doesn't help that when you're playing you're so focused on the game that you tend not to notice much else like battery life and time passing.