FOB stands for free on board which means not attached to the car. This is a small device that provides access to the car remotely usually this is a key with small buttons, that locks and unlock the car’s door. this simply refers to the key less entry system, it includes short range radio transmitter which sends a distinct coded signal to a receiver unit in the car when a button on the fob is pushed. That in result unlocks or locks the doors.
Id.3 and Id.4 MEB chasis contains lithium ion battery pack, off course below the floor, each cell voltage makes up to 3.6V with a capacity of 78Ah, energy density of 265Wh/kg