FruitJuice review: Practice good battery health with your MacBook
Leaving your MacBook plugged in all the time—for example, in order to use it with an external monitor while its lid’s shut—can be bad for the battery’s longevity. The Battery Project’s FruitJuice (Mac App Store link) aims to help you keep your battery healthy by telling you when and for how long you’ll need to unplug each day.