Just last night, I submitted an error report about battery drop off, copy/pasted below.
Notification shown up to say 5% battery.
I changed position to grab the cable.
Plugged the cable in and it was showing 2%. Then as the "charging" indicators appeared, the battery dropped to 1%. And before they'd even faded from my eyes the phone shut down.
I've attached 2 screenshots to show the drastic drop before the device shut down.
If you still notice an issue with battery drain on your device, please let us know about it via the Samsung Members app. Don't forget to attach the log files so that our developers can take a look at the problem 😉.