If you buy a bt-500 from handheld scientific you can hook up to a powerbank and use it semi wirelessly. You’ve still got a cable going to the powerbank and adapter but at least you don’t have to run a cable to the laptop.

Alternatively keebmaker sell wireless cornes and Ferris sweeps - you’re best off getting the sweep because the leds on the Corne drain the battery life even when they’re switched off.