i get about 90km of range from a 500Wt Bosch battery. Thats running at full power the whole time.

That is amazing performance. I usually get about half that.

I usually ride faster than the motors limit, so it's really just acting like a push, and most of the battery is spent dragging me up a really big hill i live on. Everywhere I ride down in town is pretty much flat.

With 600Wh battery and Shimano Steps E5000 in lowest support level I can easily ride 250km/charge

Cycles is not the only variable in play here:

- Depth of Discharge - how often you go from full to low battery? Going twice from 80->30 (which accounts to a single cycle) is much better than single 100->0 cycle

- Thermal management - what are cell temperatures when battery is being charged? Maybe it is charged in direct sunlight? This will kill battery pretty fast. At what temperatures are the cells when driving the ebike?

- Ebike/scooter probably being charged to 100% more often than necessary.

- Did you leave your battery at winter completely discharged or fully charged in your garage? Bad.

TLDR: Info I gathered about reading how to take care of Lithium NMC batteries which are so widespread.