http://community.frame.work/t/can-you-remove-the-top-screen/4372/10
if you run the system without a battery on a small charger, like a 45W charger you may see significant throttling, or will not be able to support multiple power hungry type-c devices and the system will shut down.
http://community.frame.work/t/can-the-motherboard-run-without-display-battery/1443/2
To get the best performance in that mode, you’ll want a higher wattage power adapter (100W if possible).