I am approaching 8,000 km on my EPLUS, roughly 1,000km of it on original NMH hub which is history now.
When I did conversion to Lithium A123 my front hub was quite sound charging to 5 bars but showing signs of deterioration.
Even when new my EPLUS felt really strong for first few kilometers , after that I could feel slight reduction in acceleration and max speed dropped.
After conversion to A123 20Ah my EPLUS has insane acceleration in level 9 even after 20km runs and even in level 4 I feel distinctive acceleration.
This acceleration is very well modulated,
far different from lifting wheel, it never happens and why it should??? To injure rider?
Only primitive, badly designed DD hub drives allow for it.