Battery Health does one thing very well: It provides a more elaborate dashboard showing details about your Mac's battery status. Tap the battery icon in OS X and the stock experience is that you'll see how many more hours and minutes it will last. This app displays additional details beyond the charge level, including the battery's capacity as a percentage of the total, power usage stats (ie. How much time was spent Web surfing, etc.), and details on the number of power cycles on the battery and its age.