New user here. Pebble blue 16gb. Previous phone Iphone 4 (still using it as 2ndary phone).Noob question here, does the battery drained quite fast if switch on mobile data+ notifications. Cause i noticed the battery percentage turned frm 100% to 85 % in a span of 5+ hours of usage. I did a little bit of internet browsing + youtube streaming + a 10 minute call during that time (all in all not more than 25 minutes) . Is it normal or something wrong with the battery?