We're all interested in saving energy. Maybe you conserve to be a better global citizen or to save money on your utility bills. Maybe you use your laptop on the go and want to squeeze every possible minute of battery life out of it. But what if the daily computing practices you follow to save energy end up wasting it instead? What if your assumptions about Mac power usage are wrong? To investigate this possibility, Macworld's lab compiled a list of eight widely held opinions about energy conservation, grabbed our trusty power meters, and started logging power usage.Related StoriesApple seeds third OS X Mountain Lion 10.8.4 beta to developers