Yep. Pull it out, esp. if you're connected to a computer. Unfortunately, and I gather this just from what others have reported but there seems to be a lot of stuck buttons (or buttons falling off) on the 801 and 901 manuals vs. the 510. I don't know if it's the fact that the 901/801 manuals are just retrofits from previous auto batts (my suspicion) or something else but whatever it is, it is the button is stuck on the on position regardless of what it looks like. I'd send it back if it's still under warranty.
Even some of the early 510 manuals weren't sealed - I have a few, and were likely retrofits too, but for as many that were out there there were very few reports of stuck buttons.