The update was desperately needed as Microsoft admitted that the slate has a number of things that require power from the battery such as the higher resolution display, active digitizer and capacitive touch. Following the update, the Surface Pro 2 jumped over the Microsoft Surface RT, the Samsung Galaxy Tab 3 10.1, the Microsoft Surface 2 and the Google Nexus 10 when measuring battery life while browsing. When it comes to viewing video, the update enabled the Surface Pro 2 to hop over the Samsung Galaxy Tab 3 10.1.
Any Microsoft Surface Pro 2 owners spot the improved battery life with their tablet?
Firmware update improves battery life of the Microsoft Surface Pro 2
source: AnandTech via MicrosoftNews, WMPoweruser