One annoyance I came across recently when upgrading to Mountain Lion from Snow Leopard was there is no option to display the battery time remaining in the Mac’s menu bar. Not really a big deal but it is pretty annoying, what do I care about the percentage of battery remaining? I need to know how much time my laptop has left, not how full it is out of 100%.
Solution: Install Battery Time Remaining and get it back. The only downside I can find so far is you cannot move it around the menu bar like the built-in apps but that is about it. Beyond that one minor shortcoming it has a bunch of other options the built-in battery app does not like warning notifications at certain charge thresholds, easily view your cycle count, and more.