Battery drain issue

[swifty]

Hello everyone,

I have a 2007 yaris and have an ongoing problem with battery drain when the car isn't running. I can let the car sit for weeks without running it and there doesn't seem to be an issue so I don't think there's a short or major drain while the car is idle.
The issue is, however, that if I run the radio for 30 min or turn on the headlights for as little as 5 min without the car running, the battery dies and I have to jump the car to start it and recharge the battery. I have replaced the battery so I did rule that out as a culprit.
Is this normal for a yaris? Do those batteries drain that quickly when in use and without the car idling?
I've been left stranded at stores numerous times by shutting off car, walking up to the building, realizing the lights are still on, and immediately going back and turning them off (no more than 4-5 min time expired).