Nighthawk M6 Pro MR6400 won't run without battery when tethered to computer

kym33 Now disconnect the cable.  Plug it into your computer.  Back to "you must plug into our adapter because we withheld information (I.E. lied) in the tech specs about what operating without a battery means.  Maybe the MR6550 is different, but removing the battery flashes "power mode change, restarting" and there's no OK to hit.  And the "high power" thing sounds like BS since like I said, the connection that supposedly doesn't supply enough power to operate without the battery somehow can supply enough power to charge the battery and operate it.  I'm not an electronics/electrical engineer so maybe there's a legit reason, but the idea that being plugged into a computer or other adapter provides enough power to charge the battery and operate it somehow can't provide enough power to just operate it seems improbable.  How does that work?