My grandma's 2011 Honda CRV isn't TURNING ON?

I'm CLEANING HER CAR RIGHT NOW. I put my phone on the aux cord and let the music play while I was cleaning. The key was on second notch to let it play. After an hour or two I noticed the music stopped. I thought it was a timeout so i left it like that for about 20 min and turned to the second notch and the radio didn't come on but the gauge cluster lit up. I got a little more worried and i tried to turn the car on to test it and wouldnt turn on! I feel like I blew the battery? The engines and stuff is all good. I'm so scared. What do I do? I need help becore she finds out!

Batterys dead
get a jump start off smeone. Its no big deal

You drained the battery.

You drained the battery. Whether you killed it, or it's just temporary, depends on how old it was. If it was fine before, probably all you need is a jump start, and then drive it around for a half hour or so before turning it off. This will recharge the battery back to normal. If it was much older (most batteries have a date on them, look for it), you might need a new battery.

You just ran the battery down, go and tell Grandma, she won't kill you. Probably.

Battery

You drained the battery, sport. It needs a jump.