Quote Originally Posted by wildthing View Post
you were computing the output of the laptop charger...shouldn't you be computing the input power requirements instead kasi yun un higop niya ng koryente?
there is no clear data to compute input power ... so using the output power to estimate the input power is the best we can do

the specs for input "Input: 100-240V 50-60Hz 1.6A" do not clearly state the power consumed by the adaptor, it merely says that it can be used worldwide and its current consumption is at maximum 1.6A (presumably at 100VAC as these devices are constant power devices, i.e., they use the same amount of power regardless of input voltage, much unlike resistive loads) ... the maximum 1.6A cannot be used reliably to estimate the input power as this figure usually represents transient current, not average current

some laptop adaptors clearly indicate required power and i've never seen one that needed more than 100 watts ... 80-90 watts are most common