I got a second battery for my a50 laptop. The battery level doesn't show on the tool bar, and I can not find it in the power options. It only lists battery one. I need to know how to add battery number 2 on the list,so that the computer can read it. Also the battery light is not lighting up with the ac charger plugged in. does it only light up when It needs to be charged. I don't have the user manual.