I'm a first time poster, long time lurker. Got my Surface Book last week. Last night, I shut down my device and connected it to the battery charger. I made sure that the white lights come on the charger connection, indicating there is a connection. I didn't notice what % my battery was charged; however, I am guessing that it was less than 50%. I leave the Surface Book connected to the charger all night long. This morning, I disconnected the charger and took the device to the office; however, I never turned on the device. Tonight, I came home, turned it on, and my battery was charged only 66%. Why didn't my battery charge to 100%. Is this a known bug? What am I doing wrong? Thank you.