[BMWMusician]

I must admit, I have not let it stay on a charger for several months, and came back and its dead as a doorknob. I've tried a audew and a noco car jump starters, and that the lights come on for a second, and then the car drains these jump starters from 60% to 0.

Any idea whats going on, or what I can do?

[E93Dude]

Originally Posted by BMWMusician

I must admit, I have not let it stay on a charger for several months, and came back and its dead as a doorknob. I've tried a audew and a noco car jump starters, and that the lights come on for a second, and then the car drains these jump starters from 60% to 0.

Any idea whats going on, or what I can do?

I'm not sure from your words exactly what is going on, but for jump starting, I would use a battery jump pack that has 100% charge not only 60%. Alternatively, just use jumper cables from another car whose motor is running. You really should trickle charge your car over night…..if your battery does not take a charge = its probably toast and you need a new one. Does your motor even turn over when you try to jump it?

You are attaching the jump start leads to the correct posts in the engine bay, aren't you?