2018 Sienna starts up just fine today. Then after driving for 20 minutes, we turn it off, open the doors, and then all the power shuts off. Lights, power doors. And it won’t start. No beeping, lights, nothing.

We jump it and it starts up fine. Drive home for 15 minutes. Shut off the car, and again, zero power.

Sounds like a battery, but the weird thing is it started just fine cold when we first got in.