I went to start my car yesterday morning, and when i turned the key, all the power went out (odometer, dash lights). The starter wouldn't even click or try to crank it. It was as if the battery was disconnected completely. I then used my moms car to jump-=start it. As soon as the jumper cables touched my car battery's leads, the lights came back on and the car started up easily. I went to school for 11 hours, and when I tried to start it up again, it did with no problem. This morning I went to start it again, and as I let the fuel pump prime, it had no issues (all dash lights were on). I went to crank the engine, and it just died (dash lights shut off, odometer included). I tried to crank it and nothing happened at all. I jump started it again, and it started fine. I went to school for 4 hours, went to start it, and no problem at all. What could be the issue here?