Battery Watch by S4BB
If you are the type of BlackBerry owner that likes to monitor battery status, and analyze the ins and outs of your usage, then you will definitely want to check out Battery Watch by S4BB. With this app you can have the both of best worlds, with Basic Mode for users that want just to see a quick overview and have notifications for battery status, and Professional Mode with detailed information, line charts that display energy levels over day, week, or month and more. Battery Watch is FREE and compatible with all BlackBerry smartphones.

More information/screenshots and download Battery Watch from the CrackBerry store
More information/screenshots and download Battery Watch from BlackBerry App World