A:Answer1. Yes, it does have a built in microphone
2. The audio is supported by harman/kardon
3. Yes, it has a headphone jack on the right side of the laptop.
A:AnswerI don't have this laptop yet but I was thinking the same as you. I guess you can use a blue tooth wireless mouse then you would have a free USB Type A port to plug in a thumb drive or cell phone.
A:AnswerThe battery is huge at 96,000 wh. However, it lasts as long as the 71,000 wh battery in my ASUS Q537FD (12-13 hours of continuous YouTube viewing at 40% brightness; Wifi, Bluetooth, battery saver all on; Balance power mode).