Now the truck sleeper has a phone charging port. There is electricity. You can charge your phone. The problem of charging in the van has long been solved. Most trucks have a place to charge. Sleeper cars are also available. It's usually at the bottom of the table. You can find it if you look carefully. If you can't find it. You can ask the conductor. He'll tell you where to charge it.
Yes, there are cell phone charging ports in the van sleeper.
There are charging devices, if the purchase is a hard bedroom, the general charging port socket will be in the aisle under the small table. Not every seat is there, usually a few seats apart, to see a charging port.