Can anyone suggest how I get out of this??

Here's the story: Today I put in a new battery delivered as a replacement for a possibly faulty one (tech support said to try it). I charged it, so far so good. Then I noticed an update was ready so I grabbed it and started the update. Now I am in infinite loop -- edge keeps giving the same screens over and over and "please don't turn off your enTourage eDGe." Well, now I can't. Power button does not respond and I can't even pop the battery out.

Does anyone have a realtime suggestions?