Wireless monitor

I have been looking/brainstorming ideas for a wireless monitor as I have wireless headphones for my PC and want to be able to keep watching Netlfix or Youtube while walking around the house. The only thing I see a problem for is a battery of sorts for the monitor as I have found a few wireless HDMI connectors that should suit my needs. Any help is appriciated, even if your help is saying no you could not do this.

One word iDisplay contrary to belief it is available on Android and if ya wanna save some money if you catch my drift you can yarr it on Android but if you use iOS you gotta pay up 5 bucks i think

Actually also another free option Streamtop kinda forgot about it but it works very well