I have a 2010 Honda Odyssey touring minivan and recently out of nowhere when I turn my car off and go inside say for a couple hours when I come back in try to start it it's completely dead the battery every time but holds the charge when I charge it

I'm trying to figure out why it's dying all the time I don't have nothing left on I've checked that several times I've tried messing with the doors to see if it was the doors I've pulled the fuses out for the doors and it still dies I just don't know I'm having a big bad time with this though because I don't have a multimeter as well so that's another hard thing for me to figure out where the drains coming from. I was just wondering if maybe somebody's had the same experience that I'm doing and what they did to fix it and I'll try to do that any help or advice is much appreciated thank you very much