The iBeamBLOCK is a projector, tablet, and external battery rolled into one

This innovative, ultra-portable display system combines a tablet, an HD projector, and a 13200mAh power bank, and it's currently being offered in the Boing Boing Store.

https://www.youtube.com/embed/4wyrTQn0rOk

Projectors allow you to instantly turn any dimly-lit room into a movie theater or presentation space. But ensuring device connectivity usually means maintaining a collection of video dongles. To simplify the whole process, the iBeamBLOCK hands over media playback duties to an integrated tablet. Despite it's small size, the tablet section is actually a full Windows 10 PC that's capable of playing anything a normal desktop can. It wirelessly streams video straight to the projector, so you can sit back and browse media without worrying about cable clutter. Additionally, it works with other PCs over HDMI, and includes a host of options for hooking up external storage: USB, MicroUSB, MicroSD Card, and WiFi.

The battery section of the iBeamBLOCK provides up to 2 hours of playback time on a single charge, making it perfect for outdoor movies or unexpected power outages. You can pick up this modular video projector here for $699.