Depends on the laptop. Mine draws around 3 to 4 amps (but that's considering the 15" monitor). Some draw less, some more. Biggest variable would probably be the cpu. AMDs I believe tend to draw more current (at least they used to) than the intel line, but it's not going to be significant. I would probably say at least 2.5 amps, though, if you consider the monitor. The bottom of my laptops say 3.15 amps.