1998 Ford Ranger Draining Power

My truck seems to be losing battery power. If I leave my door open for 5 min, it drains battery power. Truck will start but shakes and turns off so I have to keep a high idle and drive for a couple miles to charge battery back up and then it's back to normal idle. I rplaced battery with new one. Never had problem before.

I had a/c service done a while back and wonder if related. Changed the whole hose assembly.

Thanks in advance for any help!