Some models of Surface Pro 3 were struck with severe battery issues, reducing their time away from the power outlet to a few minutes or less. Microsoft issued a firmware fix in late August that appeared to work, but new complaints are growing about another battery problem, as reported by InfoWorld.
Microsoft has two sources of batteries for the Surface Pro 3: Simplo and LG. The first issue, the one that's now fixed, applied to systems with Simplo batteries: affected systems saw the battery's charge capacity drop steadily, becoming unable to store any significant charge. The firmware fix reset the reported capacity.