I buy this cable to make my 2m cable into 3m, for my 100W PD laptop it won't work, always breaking the connection of power and then stay in 5V rather than 20V, I guess is too long for be stable in lines to detect the right data. However for phone charging works well on 9V. I don't recommend the cable for high PD devices, you better buy good quality 3m cable alone. However this works with other less demand devices.