I'm after in-ear Bluetooth headphones that run on AA/AAA batteries.  Has anyone seen something like this

I'm going to get rid of my Roku 3 and get a Shield TV or a MI Box for the bedroom.
This means losing the handy headphone jack in the remote and finding a Bluetooth solution

So far I've come across in-ear models in local stores that are about $65-100 that have about 8hrs use per charge.
I can get similar no-name ones for about $20 off aliexpress/banggood.
Alternatively there is something like this receiver box  that could also work.

Ideally something that runs on AA/AAA batteries would be better as I already have heaps of rechargeable ones.
If its not doable then I think getting 2-3 of the aliexpress units would be the way to go