Android OS #2 on Battery usage screen

[ikramkhasim]

Does anyone have the same issue where "Android OS" is listed as the number two item after "Screen" on the Battery usage screen under battery stats? I can't figure out what Android OS has running though since usually Facebook or other apps that I constantly use should be on a higher ranking. Anyone noticed the same thing?

[The_Newtype]

Honestly, the battery has proven fantastic for me thus far. I achieved about 7.5 hours of SoT the other day, and I'm never worried the phone will die on me as the day carries on. I usually have BT Off, Wifi On, GPS is on only when I use Google Maps, disabled facebook, and primarily use Twitter, Chrome, Google Music, Phone and SMS -- pretty basic usage.

Granted, the camera is absolutely terrible, so I haven't been using as much as I would like...

[ikramkhasim]

I'm having this issue now. Android OS is on top, much higher than Screen. What's going on here?

[adamlee2014]

1. Today mine is draining again with the screen of for several hours 93% to 87%

[dante2086]

I have the same problem. Cpu spy shows that my phone isn't going into deep sleep. Android OS is apparently the cause. The funny thing is that my brother's XZ doesn't have the same problem. His battery life is great. The attached screens show the overnight battery usage. 

[ikramkhasim]

I'm wondering if this is caused by Bluetooth. I connect my SmartWatch 3 to my phone on weekdays, and also on my car audio daily. Maybe it's just lumping Bluetooth together into Android OS rather than listing it as a separate process?