Mine dies after a single operation... I have an ultra. PM button not visible, and handset dies before I can get to settings. I moved the remote to another Roku and it failed again. The good remote worked on the switched Roku.
Thank you for letting us know about the remote battery drain issue you are experiencing.
Please send me a private message with your Roku account email address, and include the serial number of the Roku device from Settings>System>About along with a summary of the issue you are experiencing. I'll be able to assist you further from there.