Oh, and about BMS battery, since the topic came up a few times in the two threads I started.
I had actually worked my way down to a final choice of their 60v 20ah battery that uses 40 pcs of the 30182 batteries.
This battery would have given me more than the performance I need, and I think it's a fair price at $759.
Only problem is that they don't list the dimensions for that battery. And while I could have changed my rear rack/bag if necessary, I was hoping to find a battery that fits in as is.
Well they seem to use a generic pic for some of them, in that they don't match the specs on the battery listed. For instance several of them are approximately 6"x6", and yet you see in the pic it is more rectangular.
So not being able to count on the pic for a rough reference, I contacted them through the online chat. I happened to be up very late the one night, and I thought it might be business hours in China, and was lucky and got someone online.
I asked if they could give me the "size" of the battery.
I was told it was it was 15kg.
I realized that there was a language disconnect, so I quickly checked their site and the term they use for size is "dimension", so I said no that's the weight, I need the size/dimension. I then said it's not listed on the site.
The person took a moment, and came back and said "it's not on the site".
I paused, a bit speechless now, and said yes, I know it's not. That is why I contacted you. I need to know the size before I purchase this.
The person replied, i'm sorry I don't have the information.
To which I replied, and i'm sorry, because I can't purchase your battery without knowing the size, and ended the support chat.

That was my only contact with them, and it didn't go very well for me.
Which is really disappointing, as I looked at a LOT of batteries before narrowing it down to theirs.