Battery usage after update

[DandelionBill]

So since the last update I have noticed the battery draining super fast, all day I've used the phone for 18 mins which was during my lunch break, 16% battery used. I know that may not seem alot but it is for me! I checked the battery usage to see what was draining it but the 4 things listed doesn't even add up to 16% they only add up to 9%! So what is using battery power but silently?? I've never had this issue until the recent update! 

[pekylle]

Same here. 

From 100% to 58% after 12 h; screen use 22 min and no app or connection using more than 2%.

Mobile network 2%

Screen 2%

Bluetooth 1%

Android OS 1%

Google Play services 1%

Wi-Fi 1%

- so what is using energy?

[afshinam]

Hi.after update to android 9 the batter consume charge a lot and finished in 10 hour.please check it very soon.
Thanks.

[hideki2]

I am experiencing this same! Battery drains like crazy. I have already made full factory reset.  I am used to each update just changing things around, but the battery drain is unacceptable in the phone that boasted about its advanced battery management functions!