Got my m3 last Thursday and my low voltage battery won’t hold a charge

[Jam Lee]

I’ve been reading online about peoples new lithium ion battery dying randomly. I just got my m3 last Thursday and my lith bath is dead. I can jump my car and charge it with my truck and then drive it around no issues, but after about 3 hrs of it sitting it’s dead. I have a service appointment set up for Thursday. Keep y’all posted on the situation.

 

[Durzel]

I'm sure I saw it said that you need to charge the car to 100% for the lithium battery system to calibrate properly. I think Tesla even pushed a message out to cars alerting owners to this fact.