After the August fix was provided, a number of users with LGC batteries in their Surface Pro 3 devices began reporting they were noticing battery degradation. Microsoft officials said at that time that the August firmware fix was not the culprit.
Microsoft officials described the problem as affecting "a limited number of Surface Pro 3 owners" who have found that "their battery can no longer hold a charge, and it looks like the battery capacity has diminished". The firmware update "corrects the logic in the firmware component that functions as the 'fuel gauge' for the Surface Pro 3 batter, so that the actual battery capacity on devices with this particular part is accurately reported", the FAQ stated.
Once this fix is applied to Surface Pro 3, the reported full charge capacity will self-correct over the next several charge and discharge cycles," the FAQ added. Surface Pro 3 users who've installed earlier fixes meant to address battery-discharge issues are recommended to install this November update, as it replaces the one released in late August, the FAQ said. Even those Surface Pro 3 users who have not experienced battery issues should apply the update, Microsoft recommended.