Oh great you got em, it sounds like you are quite pleased with them and I am still too. I leant them to a girl in the office who has some SkullCandy's and now I can't get them back off her again
![Stick Out Tongue :p :p](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
. I had to look up the battery life online (couldn't be bothered to look through the booklet and the website doesn't say) and apparently they're rated between 30-35 hours. Mine are still going strong at the moment so that could be about right. I have tried turning them off when I'm not using them because otherwise it will drain the power, but I did forget one day... oops! I will get some rechargables for them, but it doesn't seem too bad.
As for the sound quality with ANC on and off, I read one review that said the bass gets louder with the ANC on and that is true (I think), but the change to the upper midrange getting more presense was more noticeable to me and that is more desireable for me. It took me longer to get it right but a different (more harsh) EQ adjustment did end up being just as nice with these headphones while the ANC is off, but it was much easier to get right with the ANC on.
Have your thoughts changed at all over the last couple of days btw?