Just bought a new Acer Aspire V Nitro VN7-791G-76Z8 a couple of days ago. I've kept the laptop plugged in but the battery level has been dropping by about 1% per day. The power charging light is always blue and it says "plugged in, not charging". I'm running Windows 10 and have installed the Power Management update from the Acer Care Center app. What's wrong and how do I fix it.