Covert to Watts, Input and Output Values provided, Covert it to Watts

raokhan

I have this Sony Laptop, the adapter has the following specifications:

These are the input and output values of laptop charger.

19.5V written in bold on top
Input:100-240V~1.3A 50-60Hz
Output: 19.5V---4.7A, the dotted line also has straight line above it, I dont know whats that symbol called, can someone help me in calculating how much watts it is?

tiny-tim

hi raokhan! welcome to pf!
~ (as you know) means AC, and that no-overtaking double-line means DC

for DC, power (in watts) = volts times amps (W = VA),

so in this case the output power is 19.5*4.7 W

(but i don't know how much extra power is consumed by the charger itself … chargers can get rather warm!)