Didn't want to start after sitting in sun
 

Hi
2013 Lancer, sat for 2 days in the sun, 1/4 tank of gas, and my battery is only 6 months old. Turning over fine, kept trying to start then slowed down, turned off key tried again and again, took about 2-3 minutes to actually start. I also, pressed on the gas at the last 2 tries(I know it's fuel injected 😉). What could of happened?? It's started fine the rest of the day?

Thank you!