The slim plug is available on adapters from 45w to monster 230w (that RTX 5000 in the P53 alone eats 110W, the CPU is nominally 45W but in reality it's oh-my-go

The slim plug is available on adapters from 45w to monster 230w (that RTX 5000 in the P53 alone eats 110W, the CPU is nominally 45W but in reality it's oh-my-god then there's a screen to power, typically 4K and we didn't even start charging our battery, previously only the 17" laptops needed 230W at full config, the basic adapter is "only" 170W). The plug center leg is for wattage detection, there's a resistor to ground and the size of the resistor tells the laptop how many watts can it draw safely.