No battery app on a D2 or D2G will report battery life in 5% increments because that's not a limitation of the App, but the framework of the phone itself. It reads in 10% increments from 100% to 20%, and 5% increments from there.
Since the latest update you can have a battery meter instead of weather on your beautiful widgets clock. Its really good if you already paid for the clocks in the first place.