No BMS.. :)

Hi, I bought an WEL Cruiser Maxiscooter a couple of month's back.

It is Chinese Jonway maxiscooter, 72V, 40Ah, 5Kw Jonway motor, Kelly
controller, no regen (thanks for that) and a pack of big yellow chinese
Li.ion batteries.

It works very well so far, with 1000km on it, but I wonder if the lack
of a BMS system is going to be a problem? Are they really needed? ;-)