Widget/app seems to lose its ability to plot a graph in the background after a month or so. Within the first month of installation of the app the graph plots beautifully. You can even see the trickle charge portion of the iPhones charging cycle. But after a month it seems like it loses the ability to plot in the background. The graph only plots when you open the widget or app. You just get series of long straight lines. If you havent opened the app for 12hours. You straight line from last plot point to new one. A reinstall solves the problem.
Dayved1983 about Battery Graph Widget