Just wait until he discovers that the truck has a battery and can charge the phone with the engine turned off. It's gonna blow his mind.

Assuming a conservative 0.5 gallons per hour at idle. A gallon of unleaded gasoline has ~153,000 watt hours of energy. At 20% extraction efficiency, that's 30,600 wh. That's 15,300 watts being burned to charge a phone. A typical phone charger uses 5-20 watts.

Edit: updated numbers to use 20% efficiency

Somehow I imagine that he has purposefully modified his phone to have a huge battery and run as inefficiently as possible.

"Not really worried about gas prices, no. Just saying I'm worried to blame Biden for it. Once we have Republican president I will forget about it. Same with eggs."