Has new battery, alternator

What is your question?

Car hesitated to start.. then after driving it a few miles to got to the gym and needed a jumpstart 2 hrs later. Figured it was the battery so i replaced it. It still hesitates to start and the guages go up and down. After driving a mile or so after it started, the battery guage went for low to normal to low again

What makes this problem better or worse?

No idea

How long has your 2007 Ford Mustang had this problem?

1 day