I have a similar problem, the device was fine straight after the upgrade but yesterday and particularly last night it hammered the battery on Connected Standby, it used 50% last nigh alone. According to the Sleep Report the USB Micro-SD card reader is the offender.
I notice there's similar reports on Windows Central, seems like there could be a duff driver in there somewhere.
I notice there's similar reports on Windows Central, seems like there could be a duff driver in there somewhere.