Battery died

New here … woke up these Monday morning to a dead battery. Jumped it an took off in it, then the battery light came on, turned around an headed back home. Once at home pulled truck in garage turned truck off key out of ignition an the truck was still running. After many attempts with the key in the ignition I finally took negative battery terminal off. Replaced the battery today after work an all seems well with the truck battery voltage, no battery light, an key turns truck on an off. Has anyone seen these problem before?

 

Very similar problems with a Jeep with a dying battery. Did all kinds of crazy things
Replaced battery and all was well...idk