samsung s6 andorid 6 battery drain

[AC Question]

After i upgrade my samsung s6 at marshmallow, i have big problems with the battery. My battery is drain by the cell standby (about 49% in 5 hours) or by android system (about 55% in 5-6 hours). I dont know what to do, after update...i give factory reset about 3-4 times, but nothing happened...