About 4 months ago my battery light started coming on when I started the car. When this happened my car would run in limp mode (lack of power), well with 5-10 mins of driving the VTM light would come on for a minute, car would jerk and all power would come back. Battery light went off as well as VTM light. Rest of the day the car would run fine. This happened everyday for about 4 months. When I would make it to a car quest or auto zone, the lights would be off and no codes thrown. They would say bring it back when the light is on. Finally I got my hubby to change the battery terminals (something told me it was them) after changing them we went on vacation for a week, drove 750 miles and not ONCE did the light come on or act up. Today I went to start my car and go get it inspected and sure enough the battery light was on, and back to limp mode. Went off by time we got to garage. Passed inspection, as pulling out of garage battery light came back on. Went to auto store, put on computer, no codes but they tested battery voltage on both battery and alternator. Both not performing at right voltage. My hubby says alternator must be bad. I don't agree. Both battery and alternator just over a year old and both just tested fine 2 hours ago. I see there was another post like mine and the guy changed both parts and it didn't fix his problem either. Any ideas before I spent hundreds on parts I don't believe are the problem?