Chrome Should Soon Be Easier On Your Mac's Battery
Whatever the relative merits of the various browser options, there's one big advantage that Apple's homegrown Safari has over most of the competition – using it as your browser can have a significant positive impact in terms of battery life on portable Macs.
Google Chrome will soon be better on battery consumption
Chrome killing your Mac's battery? Google's working on it
Google explains how it will make Chrome suck less battery