On the Bafang website there is no 720 wh battery compatible with the M820, maybe the battery with the round tube that they teach is the one that bafang announces as for EROAD, The anchors of these batteries are totally different as they are not removable and are designed to save weight, for a light ebike a 720 wh battery does not make much sense, it is very rare that bafang develops a 720wh battery with that concept. I think it is a frame manufacturer error.This is a picture of the 720 Wh battery. Completely different from the Bafang 410 Wh…