Hey there, i suggest you to get account here. It's easier to get answers and ask them.. but that on side.
If your phone is brand new (you are first owner) phone tend to drain ALOT batter in first couple of days-even a week before ,,normalise it''. Ofcourse i bed you don't put your phone down so that drain battery too.. maybe install alot app at once and they all work in background (battey saver>disable what you don't need) and that, my friend, is battery kiler.
My advice: wait some time. Week or even more.. phone should be normal after that period, if not try hard reseting it and setup without backup option (maybe some app is stuck in proces).
Ps. and about calibration, some people had issuses with right battery % so they left phone drain till shoot down. Then put airplane and charge it to 100% and let it charge even more..couple of hours more. Do taht 2-3 times and their % was normalised. I do that after hardreset.. it might not be good but i still do it.
Have fun using 930, amazing device !