A quick update to my previous post.

In the three hours after last time check I used the phone to dismiss a dozen e-mail alerts (i.e. not a lot), and then to (again) check for app updates, and instal around half a dozen (~3MB download). The battery level went down by 10% in that time, giving an approximate idle battery life of at least 30 hours, and that's connected to WLAN, and doing all the stuff it always does in the background (see the top of my previous post).

I'm happy.