The HoloLens charges through microUSB. A charger is included within the case. The microUSB port is on the bottom of the HoloLens, at the back right. The battery lasts around 2-3 hours. Please charge HoloLens before returning it to its locker.[caption id="attachment_139" align="aligncenter" width="600"]

The microUSB port is on the bottom back of the HoloLens, at the right. On the left side is a 3.5mm headphone jack if you wish to use your own headphones instead of the built-in speakers.[/caption]