surface book battery life

Hello All! I got my Surface Book last Christmas and have loved it every since, despite the bugs of course. Recently I have noticed that it has been dying quicker than usual and I noticed that when I click on the battery icon in the taskbar that battery 1 says "Not Present". That is the battery...

Was having issues with my Surface Pro 4 i5 128GB that I picked up last week. Keyboard wouldn't connect all the time, had to do the pull off and reinsert keyboard several times. USB port at times would disconnect my external drive when transferring pictures. The latest Firmware would not install...