Ebikemotion Range Extender test - didn't go as expected

Detailed range test of the ebikemotion main battery and Range Extender battery - but it didn't go to plan.
Note: it is recommended that the range extender be switched on at the start of the ride. However, to achieve the main battery test at the same time, I ran that battery down first and then used the RE to recharge it, which is also a recommended use.