my Eplus system converted to A123 battery is installed on BIRIA bike and running.
Battery needs finishing like sanding, priming ,painting, otherwise electrically it works perfect with orignal factory BMS boards, however of course SOC INDICATOR is out of wack and no wonder, because only discharge is metered by factory electronics, no charge is metered by facory BMS, because A123 is not charged through original BMS but outside of it.
Went to work twice 13km round trips in below zero temperatures.
A123 cells perform dramatically better than factory NMH .
In fact I cannot even imagine NMH cell battery in minus 10C.
Even in subzero temp ebike feels peppy even after 13km ridden.


Hudge improvment is charging.
It takes like 30-45min charging only after riding 13km,
NMH hub battery would require min FIVE hours complete /with balancing stage/charge time after such ride.
Simply Lithium can be charged at high rate - my charger pumps 17Amps, original NMH charger is 2Amps charger, simply put NMH cannot be charged fast if you want it to last, for A123 17A is a piece of cake - is not even 1C charge.
As you can see in picture above
front wheel has just empty shell, no wires coming out of hub.
BMS electronics moved from front hub are sitting in my A123 battery.
Anther beauty is Low, low Centre of Gravity. Result - very stable predictable ride.