JuicePlotter is a battery usage graph that combines full at-a-glance information about your battery consumption. It is perfect for me to track battery usage on Android HTC HD2. And it shows screen brightness, radio usage, charging status and battery temperature. Besides, its home screen widget shows an accurate estimate of how long it will take to fully discharge / recharge battery.
JuicePlotter is useful to track battery usage on each Android build that you try. The CPU speed, voltage, screen brightness, radio usage and battery temperature will determine your battery life. So it is good to keep track and find out which Android build is the best for you.
Download JuicePlotter at Android Market.