Users started encountering Battery and network issues after installing the Android 7.1.1 OS. A few users reported telephones fade away despite the fact that their battery is a long way from discharge. Some clients experienced trouble marking into Wi-Fi networks, while others encountered Bluetooth availability issues. The troubleshooting steps you have to take if you are encountering any of these issues with your Android smartphone with Android smartphone are below the line of troubleshooting tips. If there is no issue with your information bearer, attempt to do a straightforward reboot of your gadget.”]
Source: https://gbhackers.com/can-fix-battery-connectivity-issues-android-7-1-1-pixel-nexus-phones/