I have finally worn out my 2019 Haibike. Battery is at 2/3 power with a full charge. Motor was surging yesterday on a 26 mile power ride. I ain't complaining, I got 5 years out of the German built and imported 350 watt mid drive motor, Very happy with the results and the ride life I have had with it. RIP little 350 watt.
Higo Double Battery Discharge Converter for E-Bike 750w and 1000W Dual Battery Pack Switch Balancer 24-72VDC (Max Current 40Amp)
For some reason I can't post the link directly.