Wondering what are the rules about swapping AC power adapters for laptops. Do they have to be exact or just close? I was wondering if I could use my Sony laptop AC adapters to power my Gateway laptop without causing damage?

Gateway
INPUT: 100-240V~ 1.6A 50-60Hz
OUTPUT: 19V --- 3.42A

Sony
INPUT: 100-240V~ 1.1A-0.6A 50-60Hz
OUTPUT: 19.5V --- 2.15