I just watched your YouTube video entitled: "Why do E bikes batteries differ so much in price?"
My question is, how can I check what type of batteries were used in the build? Does it open up, so I can check the brand? I kinda doubt it. Some unscrupulous sellers may even fool honest retailers.
this is why it pays to go custom with batteries also. you pay more, maybe double in some cases but you know what cells youre getting, all the specs, and a quality pack. rather than cheap cells in a bulky plastic case taking up more space and weight, which you cant identify... i wouldnt buy a pack without knowing what kind of cells are in it, for starters.