How quickly is the battery draining? How much have you lost after 30min? After an hour? Personally, I do see a quicker battery drain, but it's not unreasonable considering that running Nextflix uses the most battery-taxing features of the device at the same time; Wifi radio for downloading, processor & gpu for processing and display, and screen. Netflix will drain the battery quicker, (to be fair any streaming will drain the battery quicker than watching video in internal memory,) but if you can provide that info, we'll be able to see if it's standard or if you're experiencing more drain.
If I have helped you, don't hesitate to hit the THANKS button