Meet Kangaroo: one of the smallest portable computers money can buy. This little machine has an Intel Cherrytrail (Z8500) SOC and an on-board battery. The standalone Kangaroo Dock offers HDMI and USB access. Just connect the dock to your existing monitor, and you are ready to access to a Windows 10 system.
Kangaroo offers Windows Hello integration. It has 32 GB of storage space, which can be upgraded using a microSD card. The battery lasts for up to 4 hours. It will cost $99.