I'm trying to decide on a portable AC power station to power four laptops for at least five hours. I have the charger units for the laptops, and I'm confused on how to figure out the power consumption from them. Mainly, I don't know whether to look at the input power from the AC source or the output power going to the laptop.
Here are the specifications I see on the adapter.
INPUT: 100-240V ~ 3.2A OUPUT: 19.5V - 10.8A
So I know that the input is AC and the output is DC. And I'm looking at a 500Wh portable power station, like this one.
How do I know that 500Wh is enough to power four laptop for five hours? I know that the laptop can consume 19.5V * 10.8A = 210.6W. Or should I be using the input power, which is 110V * 3.2A = 352W?
With those numbers, there seems no way that 500Wh can power four of these laptops for five hours. But the power station claims that it can charge a laptop 7+ times, run a mini fridge 7+ hours, and power a TV and game console for hours.
My question is: Can a laptop really consume that much power under light use?