Went out to start my car battery was dead jumped it and started right up. I shut the car off came back thirty minutes later and it wouldn't start. I pulled the battery out charged it and did a load test on it and it was good. I put the battery back in the car started right up. Tried to start the next day won't start and I can't jump it either. Need a little help please it's an 09 R/T the battery is almost a year old.