Please remember, Aliexpress is NOT a store. It’s like eBay. Some stores are fantastic, like Wendy Xie at Pasionebike . 18650 batteries are not anywhere near as freaky as LiPo. I’ll be posting my Ammo case battery charging safe soon. i just have to build a sacrificial battery pack for a live burn demo.Thanks for the info. I figure Ali is always a longshot just from experience with guitars. To be honest I avoid them. I don't do FB ( or any social networks) but I will have my wife check out Chen on her FB. I have heard good things about UPP and when I saw info on how to order and upgrade assumed it was a heads up for the company. After seeing burnt batteries I'm not sure. Anyway, a 36v 17.5 ah would fit the bill so my wife can extend her range. She plans to use her bike for wildlife photography. I am very aware of the danger of lipo batteries and kept my drone batteries in a "flame bag"
The fires were user error. But a design like we use can not lead to a flame out like in the video. If I were on a budget I’d probably use UPP again. Understanding the potential issues would be during charging, my ammo box safe would mitigate any problems. I know, I know, Schizophrenia is a cruel master.