My car is a 2019 Jeep Cherokee on Friday my car wouldn't start. On my dashboard it said low battery voltage. I have had the battery a year and a half. I had someone jump it off and it started up. I took the battery to Auto Zone to have it checked and they said it was fine. I drove it Saturday and Sunday with no problem. The battery voltage stayed around 13.9. Today Monday it wont start and the voltage read 10.3. Could this be a bad battery or something else? Help
I would suggest it is most likely a bad battery. It sounds like you might have an intermittent problem with a cell within the battery which is shorting out. 10.3vdc is about what I'd expect when this happens.
If the battery is only 1.5 years old, it should still be covered under warranty where you can get it replaced for free. I'd pull this string and get it done or you're going to continue to have the same issues.