A:AnswerToo many factors to answer the question. I’ve been impressed with the battery run time. But I don’t play music. You tube while playing a game with the screen full brightness. All things that affect battery life
A:AnswerYes you can. The Chromebook has USB-C with display out capabilities. You would need to use a USB-C dock or a USB-C to HDMI adapter on your monitor/projector.