Do I need a new battery or something else?
My car sat for 4 months without even being started up. When I finally did start it, there was no problem. It was taken to a mechanic for a coolant issue and they ran the car a good half hour with no problem. I then drove it about 2 miles homes with no problem. Two days later I went to start it up again and it did absolutely nothing. Not even the power locks were working. I had AAA come out to jump it and their jump packs weren't strong enough but they were able to jump it from their truck. It sat and ran for 20 minutes. I turned it off and then tried to start it again and it just sputtered out. The tow truck driver told me it's the battery but the battery is less than 2 years old. Is he right or could it be something else?