Got a response from AR just now. See below.
I responded to Karen D that AR should let their customers know that the recent firmware did not completely resolve the battery draining issue.
Again, poor customer service by AR. They should have said the update would not completely solve the issue and let their customers know this up front!
I am so disappointed in AR.
Hello,
The firmware update did not 100% resolve the issue. It improved it. I will let the engineering department know that you are having this issue. I apologize for the inconvenience.
If you have any further questions, feel free to reply directly to this email and I'd be happy to assist.
Best Regards,
Karen D| After-sales Technical Support