Simply stitch the two ends together with a darning needle. Make sure the yarn you use is the same, and the knots on the end of each are small so they will go unnoticed.
You will need quite a large scarf, like those square-shaped scarves. You could tie it like a turban to cover completely, or you could embrace the look and go slightly...
Sounds like either your battery isn't charged, is dead, or not inside your laptop. For Windows: when your laptop is on, you'll see a battery icon in the tray. It'll...