I was on with a MS rep earlier. Seems that there is no "spec" on how many time I can charge and recharge prior to experiencing significant battery degradation. On my last Asus notebook, I think it was at least 300, on the iPad I think it's 800 or 1000? Would be good information to have. Also not apparent - does the battery stop charging when it's at 100%? Many laptop computers do stop at 100% so it's ok to keep plugged to charger all the time; important information for me as well (and I'm sure for many others) as I am in the office 90% of the time and it's easiest to just keep attached to the charger except when I travel. Any factual information would be appreciated. Thank you!