I have two chargers, and two batteries...all identical.
They are both 52v Samsung 29e 18650 20.3ah batteries from Luna and work nice
They both charge identically to 55.1v-55.5v or so.
The Luna site listed the batteries as high power and good for the Bafang.
Both batteries work PERFECT with my Tangent kit....but I don't know batteries well enough to compare types.
I don't know electricity well enough to know why, I just know it makes me go fast and smile.
This Bafang puts out a steady 25-30mph when the bike is in repair stand and full thumb throttle.
It can hold this speed for a good while...no shut down issue when run without friction or load.
The display reads 100% full battery...no low battery warning.
I have a message in to LUNA about the Bafang, and they are quick with responses...but the holiday may effect that.
I will see if I can borrow a PC and get that cable...I'll try anything to see her smile like that again