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On several occasions I have encountered difficulty connecting EVSE J1772 plug to the car socket. The problem in every case was a rubber sealing ring inside the plug was out of position. If you can't fully seat the plug, take look inside at that ring. If dislodged, you can prod it back into...

We all know that as the lithium ion battery ages and accumulates charge cycles its capacity to store electricity is reduced. My question is, does the charging efficiency also decline? That is, does the ratio of energy in vs energy out also take a hit? Can someone direct me to a technical source...

We all know that as the lithium ion battery ages and accumulates charge cycles its capacity to store electricity is reduced. My question is, does the charging efficiency also decline? That is, does the ratio of energy in vs energy out also take a hit? Can someone direct me to a technical source...

Since the i3 has no transmission per se, and achieves reverse by switching polarity on the DC motor presumably, it should be technically possible to drive the car in reverse at 150kph, the same as forward. Did BMW put a software limit on reverse to preclude high speed reverse?