Default k900 battery problem

Hi all,
My lenovo k900's battery got stuck @ 94% from the past 2 hrs,i've been playing asphalt 8 to check whether battery drains or not,even then my battery is 94 itself,its not getting heated too.if it doesnt get heat dats a good thing but battery % remains at the same level,wat may be the problem?
i restarted it to make sure and i noticed a new thing,battery usage shows me 49s battery used, i mean wen i restart my battery usage is starting from dat time,please do resolve my issue,,,,,mine is non rooted phone