Quite a few endusers are complaining that upgrading their Nexus 6P to Google's Android Nougat operating system is draining this devices battery. This seems to occur on Nougat 7.0, 7.1, and 7.1.1 respectfully. Google has not responded to this problem as of yet.
Some Nexus 6P owners were able to rectify this battery drain problem by upgrading to Android Nougat 7.1.1. However, others are still complaining even after installing 7.1.1. Nougat 7.1.1 is currently beta software.
Many users see major problems when a battery life nears twenty five percent charged. Either this Nexus 6P will completely shut off or discharge even faster. One possible solution that some users tried was to boot into a safe mode and allow this device to completely discharge.
Once a Nexus 6P shut off, then performing a complete charge to one hundred percent rectified this problem. Another possible solution was to perform a factory data reset. Downgrading if possible back to Android Marshmellow 6.X seemed to also fix this problem.
This problem seems not just exclusive to a Nexus 6P smart device. Other brands and models of smartphones seem susceptible to Android Nougat 7. However, even some Nexus 6P device owners claim this device's battery is not draining abnormally after upgrading to Android 7.
A thread over on Reddit has hundreds of comments documenting this seemingly software related issue. Individuals will perform certain tasks ie. taking a picture, surfing Internet, watching a YouTube video, etc. when all of a sudden whatever Android device they have completely shuts off. Some of these devices will then not power on without plugging into an AC Adapter or USB charger.
For now it seems as if possible that this Android Nougat 7 issue is specifically succinctly primarely affecting a Google Nexus 6P. However, reports of other Android devices being affected may alter this viewpoint. Hopefully, Google will look into this issue further if it is indeed affecting a large number of users, if not endusers will have to try to narrow down and troubleshoot this issue themselves until a possible software patch is created.