Stalls shortly after taking jumper cables off?

Hello,

It sounds like you have a bad alternator. A good battery will start a vehicle but in order for the engine to keep running the alternator has to function properly.
As you can jump start but as soon as you take off the cable the alternator drains the battery and stalls the engine.
You need to test the alternator output.

Here is a helpful video:

https://youtu.be/Z-p4dMJUpUw

https://www.2carpros.com/articles/how-to-check-a-car-alternator

https://www.2carpros.com/articles/how-to-replace-an-alternator

I have included the alternator replacement instructions for your reference.

Please let me know of any questions.

Thank you.