Note: Before you switch between one battery and two batteries configurations, please hold the “ ” button for 5 seconds to release the remaining power in the circuit board. (when you make a switch from one battery to two batteries, the circuit board will keep the single battery settings if you haven’t released the remaining capacity; and vice versa.)
I doubt this will help, but worth a try.
I did try that and got the 'Lov' message and it powered off.