Hi So, I feel like my ipad mini retina with cellular is a tad shorter battery life than I expected to be. mixed use (play non-serious graphic games like hayday, PvZ2 etc. and surf the web and social thingly.) the result is below. well, I'm not sure if this is normal and I was just too expected for it but I saw most other guys in this forum got 15-20 hours of battery life and even 3 days of standby! By the ways, is it safe to charge the iPad overnight? I heard it has a cutting system when your battery reached 100% but I'm not entirely sure..