What controllers are these?

[CJH]

I have picked up a 48V ebike with a Bafang 500W hub motor. It has a controller built into the battery attachment and it also has a spare controller that apparently has different settings. I'm trying to figure out what I'm dealing with and was wondering who is the source of these controllers? I'm interested in possibly sourcing another but with different specs to suit my riding style.

 

[Cory]

Before deciding to buy a new one, I suggest you check and confirm as many of the technical details as you can. Because there should be different settings, parameters, protocols, etc. If not compared, then the error code comes and it shows on your ebike display(if you have one).