Hi all. Just a quickie! The battery usage monitor/graph (menu>settings>about phone>battery usage) shows a graph with a horizontal & vertical axis. The vertical states time on battery (in my case 2h 10m 5s at present) What does the time on the horizontal axis represent? (in my case 1h 47m 19s) Sometimes these times are the same, at other times, they are a couple of minutes different or 25minutes or so like the above example. I am confused! Any ideas? Just refreshed, and now only 4 minutes different!