Some of the early reviews of the Microsoft Surface Pro 2 were somewhat critical of its battery life. While this tablet could go longer than its predecessor, it didn’t seem to be living up to the potential of its Haswell processor.
Since the release of this model, however, Microsoft introduced a firmware update, and the situation has changed significantly: the Surface Pro 2 is now getting 8.3 hours on a single charge in Anantech‘s test.
This test involves web browsing. In a video-playback test, the tablet went from 6.7 hours to 7.3 hours by installing this firmware.
It seems clear that anyone who hasn’t updated their Surface Pro 2 recently should do so soon.