Not cranking over issues jump the battery?

Please do not remove the positive cable from the battery while running, you can blow out computer modules. It sounds like the battery or alternator is bad. I would jump start the car again and then use a voltage meter at the battery to see if the alternator is charging. This guide can help, if the battery is charging that replace it with a new one and the problem should be fixed, here is a guide to help you:

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

Here is how to change the battery out. Check out the images (below). Please let us know what happens.