Then my car is sold.
I got into it this morning, and it was completely dead. Same thing happened last week. I don't think its the battery because I just bought it 6 months ago and its an Optima red cap. I gonna have it checked out anyways.
What other possibilities are there for this to happen? It may coincide with the rain, but there wasn't any water around the battery. I also have a large system, but i don't see how that could kill the battery while the cars not on. I made sure the amps power down. The alternator still works to some degree, because my car doesn't die that often.
Please through some knowledge this way.

Will it start after while of cranking?

Possibly a fuel pump going bad or maybe you may need a new filter?

There could be 100 possibilities, you just need to elaborate a little more.

I had the battery and alternator checked out and they look perfect, but it looks like i still have a drain on the system. Any ideas?