12:26am - 60% (quick phone call and a few texts)
1:03am - 60% (receive email and open weather app)
3:23am - 55% (no activity since 1am)
12:32pm - 40% (received facebook notification, checked and refreshed)
11:30pm - 15% (couple of bbm's and texts)
Just a note, you should never let a lithium battery get below 20% on a regular basis. Doing so can damage the battery and seriously reduce the cycle time and also require replacement much sooner than normal.
Maybe you were just testing, but a lithium battery works much better and lasts longer if you keep it topped up when you can.