XGIMI - H1

After having battery issues with projectors I actually prefer external batteries, but the projector needs dual usb for video and battery. I had the xgimi h1 projector and got many hours of use from it before it died because I wasn't cleaning enough dust out of it, although the built-in software was pretty crappy outside of the settings menu (even aftera few updates). Maybe they've refined the software platform by now, H1 was pretty much their first product.

300 ANSI lumens will be enough for a smaller image size and a relatively dim room. I use a benq gv30 on the ceiling over my bed. I'm thinking of upgrading to the gv50, but the extra brightness is a nice-to-have not a need-to-have. I had an 800 lumen projector (xgimi h1) I could use with regular curtains 80% of the time, and the image size was pretty large. I should've mounted closer to the screen for a smaller brighter image but by then I was too lazy to redo all the mounting work. If I really needed to watch something during the brightest 4 hours of the day I'd use my laptop screen. It also depends on how your roommates feel about living in perpetual darkness/how frequently you plan to use it.